Zoe's ex-boyfriend from Las Vegas, a famous piano player, shows up in Chicago and asks her to find a "thief" who's been breaking into his house and giving him half-eaten sandwiches and clothes. Meanwhile, a greedy lawyer falls through a window while showing off his bravery to potential employees. When a video camera reveals that Zoe's ex-boyfriend was on the same floor as the lawyer that same day, she must find out if he has anything to do with the apparent accident.

Zoe investigates a house that may have been vandalized by ghosts. Meanwhile Zoe is in over her head with all of the Halloween craziness with her nephew and nieces.

Though fearful of a forthcoming performance evaluation by her boss, Zoe must unravel the life of a man just found dead of a heart attack, who was supposed to have died three years earlier in a boating accident.

Dan takes up a job at a spa when people there gets sick from a pesticide in the mud. Taylor gets an F on her essay, and learns she has a learning disability. Meanwhile Zoe wonders why Sophia has been avoiding her after she gets promoted.

Zoe investigates a possible sorority prank gone awry while struggling to sort out her love life.

Professionally, Zoe and her co-workers try to find out who sabotaged a wedding at an exclusive country club by making the lawn sprinklers turn on at an inappropriate time. Personally, Zoe has to deal with the sudden re-appearance of her nieces' and nephew's deadbeat dad after a 7-year absence.

When the client database of an online dating service is wiped out, Zoe goes undercover to determine whether or not it was an accident. Marcos asks Zoe to spend the weekend at a remote cabin with him, but she initially refuses because she thinks that this would set a bad example for Taylor. Then when Zoe decides to tell Marcos that she has changed her mind, she finds that he has already made plans to go with someone else.

As Zoe, Dan, M., and their co-workers get ready to leave work for the day, a woman gets off the elevator on their floor and holds them hostage at gunpoint. Zoe recognizes her as the mother of a recently convicted murderer whom the team had helped convict. The woman reveals that somebody at M. Pearl McGuire Investigations contacted her claiming to have evidence that would prove her son was innocent and that she was supposed to bring $25,000 to buy the evidence. M. is determined to find the blackmailer and nobody is above suspicion! Meanwhile, M. is nominated for Businessperson of the Year and Dan's father comes for a visit while back at the Busiek house, Hannah has a friend over while Taylor works on a paper with a boy who has a bad reputation.

In the series finale, Zoe and Dan go undercover as a soon-to-be-married couple to catch Leo's sister's murderer, who is a wedding planner. As they struggle to keep their cover, Zoe discovers an offensive item in Dan's suitcase and nearly calls off the "wedding". Meanwhile, Leo isn't afraid to break the rules to nab the killer. Taylor, Hannah, and Cliff are convinced that Zoe has eloped with Dan when they overhear a phone conversation. In the end, an emotional wedding leaves Zoe and Dan in a sticky situtation.

Melanie St. John, an old friend of Zoey's is suspected of murdering her estranged husband Robert. Zoe and Dan are assigned to work on the case and find that there are many more suspects including a son-in-law who had a suspicious relationship with his father. Zoe and Dan are sprayed with a fire extinguisher when they interrupt a burglary in progress at Robert's house. Taylor gets a job as a waitress in a mama and papa restaurant and begins flirting with a waiter who also works there.

Zoe and Dan investigates a man who crashes his car into his house and almost hits his wife. Meanwhile Taylor tries to run away with Ryder, when she learns her father came to see them but Zoe didn't let him see them.

Zoey has back problems and M. insists that she goes to see her chiropractor. Once there, she's attended to by an attractive doctor around her age and the two hit it off. Dan, meanwhile, must work with a bounty hunter to locate a man who viciously murdered his wife and her attraction to him isn't reciprocated.

Zoe gives up her job as a blackjack dealer so she can raise her nieces and nephew after their mother dies in a car accident. Sophia Mason and Dan Lennox, special fraud investigators, tell her the family is denied any financial settlement because they think her sister was responsible for her own death. Zoe decides to go on her own investigation to prove her sister wasn't at fault while trying to find a new job. Also, Zoe runs into an old flame and Taylor disappears.

Zoe finds out her partner Dan used to be engaged and used to be a thief. Meanwhile Dan's ex-fiance comes to town. Marco's ask Zoe out on an date but she turns him down the first time. Sophia and her boyfriend try to find a house but have difference of tastes in a place to live. Dan discovers he has feeling for Zoe and goes to tell her, but when he does he see's Zoe and Marco's kissing on the porch.

Zoe and Dan are forced to share a motel room when they look into the death of a farmer's prize bull.

When a contestant on a reality show dies, Zoe auditions to be on the shows upcoming season. Everyone from the crew members to the competitors is a suspect.

When a fog machine at a strip club explodes and causes the death of a dancer, Zoe goes undercover as a bartender to determine if the explosion and resulting fire were just accidents. But is she good enough to fool Mimi, the savvy club owner? Meanwhile, back at the office, Sophia becomes frustrated when she is overlooked for a promotion. And at home, Taylor must choose between love and loyalty when Julian, the neighbor boy, starts flirting with her even though he is dating Taylor's best friend Carla.

A kidney is stolen from a nurse on an elevator who is delivering it for a surgery. While searching for the kidney, Zoe and Dan try to expose a man they suspect of faking disabilities. Zoey's car is stolen with Hannah's volcano science project in it! Zoey must get her car back with Hannah's volcano before Hannah finds out it is missing as well as find the kidney and save the patient's life.

A professional basketball player wakes up from a hangover and sees a dead woman's body on his bed. Fearing his freedom, he flees while a sports reporter records his every move. His agent hires Zoe, Dan, and M. to find the basketball player and clear him of all charges. A competitive rival, a jealous wife, crazy fans, and the athlete himself round out the suspects in the murder.

Zoe closes a claim for Dan and winds up getting shot when she walks in on a burglary. Her co-workers try their best to find the person that shot her.

Zoe and Dan snoop around when they here four burglary claim and each one of the residents is hiding a secret they might just help crack the case. Zoe starts to fall for the carpenter that comes and does the houses.

Zoey finds out that her boyfriend is married and angrily breaks up with him. The next day he is found murdered and Zoe is suspected of murdering him! Zoey finds out from her bank that her identity has been stolen by a woman resembling her who has been using Zoe's name. Taylor, Cliff, and Hannah are delighted when a large expensive boat is delivered to their house while Taylor is furthur excited when Dan buys an expensive lightbulb for her fundraiser.

Zoe investigates her first case

When the host of a popular children's TV show gets blackmailed its up to Zoe, Sophia, and Dan to find out who the blackmailer is. Taylor travels to Columbus to get Ryder back only to find out he hooked back up with his ex-girlfriend. Dan and Candi break up after she realizes Dan has feelings for Zoe, so Candi decides to move back to Las Vegas. Dan trys to tell Zoe how he feels about her, but instead he kisses her on the elevator. Zoe meets Marcos at the restaurant after her and Dan's kiss and tries to tell him about it, but when she tries, she finds a ring in her glass and Marcos proposes to her.

Zoe disguises herself as a cruise ship singer to find out how a woman died from a venomous snakebite while on the ship. She soon discovers a boatfull of suspects.