Secrets of Sulphur Springs follows 12-year-old Griffin Campbell, whose family has just uprooted their lives to 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. Not long after Griffin begins his first day at a new school, he learns that the hotel he's just moved into is rumored to be haunted by the ghost of a girl who disappeared decades ago. Along the way, Griffin befriends Harper, a bright-eyed, mystery-obsessed classmate. Together, they uncover a secret portal that allows them to travel back in time where they'll uncover that the key to solving the mystery may lie within Griffin's own family.
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 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 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!
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 realise that Savannah could have found the portal and travelled back in time, too; together, they go back in time another 30 years to 1960.
Griffin and Harper use the old radio in the hidden room to lead them back to Savannah.
Griffin and Harper set the dial on the radio to take them back in time where they hope to find Savannah and they are shocked by what they uncover.
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.
Griffin, stuck in the future, learns the ghost ruins their lives. Harper and Savannah try bringing him back to the present.
Harper and Savannah retrieve Griffin from the future. Sam and Griffin face the grimmest 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.
Complete episode guide for Secrets of Sulphur Springs with detailed information about every season and episode including air dates, summaries, ratings, and streaming availability in United States.
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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.
When Sam can't get his Time Machine to work, Savannah vows to help him; meanwhile, Griffin tells Daisy that he thinks Topher is hiding something and enlists her to find answers.
The Tremonts were duped by the Judge and have 48 hours to vacate their land. Meanwhile, when Griffin and Daisy rush towards the portal with the crystal, everything goes black!
Harper returns home and fills Griffin in on the deed, stolen land, and her visions of a fire. After Sam disappears, Savannah finds a note saying that he's travelled to the future.
The Campbell's and the Dunn's prepare for the Tremont's Grand Re-opening! Harper and Griffin realize that the crystal is cracking which may prevent the Time Machine from working.
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.