A sick Lucan rambles about the crime he witnessed and is suspected of being the culprit, but the real danger is his guilty doctor.

Prior to the eruption of a forest fire, Lucan rescues a domesticated wolf on his way to a mountain rendezvous with his friend Dr. Hoagland.

An eccentric millionaire holds Lucan hostage to acquire Dr. Hoagland's newly developed antidote for hallucinogenic poisoning to cure his drug-addled son.

A government agent plots to use Lucan's superb tracking instincts to locate a hidden gold mine.

Lucan's search for his parents leads him to a custody battle between a young widow and her mother-in-law.

Lucan returns to his old countryside haunts and runs into trouble as the farmers hunt down the wolves he grew up with, and a local man with a guilty secret develops a grudge against him.

Lucan becomes a prizefighter to pay the bills for a private detective to find his parents. The private detective is just using Lucan stringing him along with false leads just to bilk him out of money. Fight promoters ask offer a cut of their expected illegal wager proceeds when they ask Lucan to throw a fight. If Lucan does not take a fall in the 10th round his doctor friend being held hostage will be killed by the folks in line to profit from the rigged fight. Lucan with help of a friend manages to turn the tables on the criminals get his doctor friend back and escape Police Detective Prentiss.

Lucan's skeptical of the couple claiming to be his parents but just as he's starting to be convinced, they're chased away by gunmen.

Lucan reads an article about a young man who found his family after being separated from them for years. He goes to talk to him but the young man gets nervous when Lucan asks him how he found them.

Lucan falls for a Russian gymnast whose life is in danger.

When Lucan rescues a boy from falling to his death, he unwittingly brings danger to the boy's family, key witnesses in a mob trial.