Griffin and Harper successfully travel to the past, where they find Savannah working at The Tremont.

Harper travels back in time to the date her father died in hopes of trying to change the outcome.

Griffin and Harper realize that Savannah could've traveled back in time.

Once Griffin and Harper learn they can’t reopen the hatch to let Savannah in, they quickly go back through the portal.

A 12-year-old boy and a thrill-seeking classmate discover a secret portal that allows them to travel back in time and uncover clues about a mystery involving a girl who disappeared decades ago from a Louisiana town.

Griffin and Harper sneak back through the portal to find a search party looking for Savannah.

Griffin and Harper realize they've time traveled to before Savannah's disappearance. When they go back again, they think they see Savannah getting taken into the woods.

Griffin Campbell and his family move to a new town and take ownership of an abandoned hotel in hopes of restoring it back to the lively vacation destination it once was.

Griffin and Harper learn the camp dance is coming up, and that is the day Savannah went missing! Later, Harper meets Jess, and learns her mom did go to camp and hated Savannah!

Ben is upset by the flurry of news reports marking the thirtieth anniversary of Savannah's disappearance, while Zoey and Wyatt see it as the perfect opportunity to finally capture her ghost on tape.

Harper asks Griffin to meet her at the portal after school, but, when Griffin gets home, he discovers his Grandfather has arrived for a visit.