Griffin Campbell and his family move to a new town, take ownership of an abandoned hotel and hope to restore it.
Griffin and Harper realize they’ve time traveled to the time period before Savannah’s disappearance. When they go back again, they think they see Savannah getting taken into the woods.
Griffin and Harper learn the camp dance is coming up, and that was the day Savannah went missing. Harper meets Jess and learns her mother did go to camp and hated Savannah.
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.
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.
Young Jess dares Savannah to spend the night in The Tremont basement with real ghosts. Young Ben comes to Savannah’s defense. Young Jess storms off and wishes Savannah gone!
Griffin and Harper sneak back through the portal to find a search party looking for Savannah. Police officers begin their questioning.
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.
Griffen and Harper try to find a way to get Savannah back from 1960.
Harper goes back in time and finds her dad who takes her on a ride down memory lane.
Griffin, Savannah and Harper find themselves face to face with Harper’s carbon copy, Daisy, and the Tremont ghost sends Harper and Griffin an important message.
Harper pretends to be Daisy to learn her family’s secrets, and Topher stumbles upon the hidden bunker.
Griffin frantically searches for the missing crystal and helps a panicking Daisy to navigate her modern surroundings. Meanwhile, Harper has a cryptic vision at the springs.
Young Sam secretly watches Harper search for the hatch in the dead of the night, and Elijah receives a visit from a judge with a life-altering offer.
Savannah vows to help Sam complete his Time Machine.
The Tremonts must vacate their land in 1930.
Harper returns home.
Preparation for the Tremont’s Grand Re-opening begins.
While trapped in the future, Griffin learns that the ghost is ruining their lives; Harper and Savannah try bringing Griffin back to the present.
Harper and Savannah retrieve Griffin from the future; Sam and Griffin gets the truth; Topher is in a coma in 2024; the twins and Topher almost catch Savannah's ghost.
The twins arrive in the past and find Savannah. Griffin and Harper realize they need to go back to 1947 just as Ben makes the bunker off-limits.
The kids learn the ghost has been listening to them and is changing up his malevolent plans.
In 1947, Harper and Griffin meet Ruby. Sarah becomes increasingly freaked out by the ghost.
Returning to the past, Griffin and Harper watch a murder unfold. The twins and Topher go to an unknowingly familiar someone for help.
It's time to get rid of the ghost.
The ghost and future will be saved.
