Part one of two. a boy named Adam and his father move to Springsville (nicknamed "Spooksville" because of the bizarre goings-on said to happen) after Adam's mother disappears, and, after encountering a spider-lizard creature in his room, teams up with two kids, a girl named Sally, and a nerdy boy named Watch, who go back in time to 1771 to find clues about the town's origins and the possible disappearance of Adam's mom.

Conclusion. The gang goes back in time and finds a woman who could solve a mystery from the present.

While solving a boy's mysterious disappearance, the gang encounters the ghost of a lighthouse keeper.

Sally, Watch, and Adam go inside a mysterious cave that may be the key in finding out what happened to Adam's mother.

While trick-or-treating, Adam, Watch and Sally see a boy being pulled into the house. Later, as they step into the house they come to know that the boy was a magician from the past and the house was actually a portal to a world where it's always Halloween and everyone becomes their costumes.

A monster who feeds on other people's nightmares appears in Sally's room.

Thanks to Ann's magic powers, Sally experiences an illness called "The Fire Inside", in which she blows smoke out of her mouth and will die from the raging heat broiling in her body, so the boys must find a rare antidote known as "Crystal Moonflower".

While on a hike, the trio find a mysterious object that can grant all their wishes, but when a robotic alien comes for his payment (which is slave labor on his home planet), Sally, Watch, and Adam must try to save themselves.

Sally finds a stray cat, who turns out to be a girl who was cursed, and she becomes human while Sally becomes a cat. Adam and Watch must call upon Ann again to help Sally.

Watch isn't feeling very merry about the upcoming Christmas holiday but that all changes when he meets a girl who may be interested in him — for a plot to bring about an alien invasion.

Ann's attempt at helping Adam find his lost mother sends her and the trio into a parallel universe in which Springsville has been ravaged by an apocalypse.

Sally's day with her family at the yacht club turns into yet another bizarre mystery when a giant mutant crab pirate begins attacking people.

Everyone in Lizzie Borden High is brainwashed by a strange plant a science teacher found in the woods as part of his Internet documentary series and Sally and Ann (who hate each other) are the only ones who can stop it.

During a survivalist trip at a logging camp, a strange fog begins picking off students one by one as they use their phones, and only Watch, Sally, and Adam can stop it.

When Adam takes his mother to the hospital after she sleepwalks in his room and collapses, Watch ends up there as well with a nasty case of tonsillitis, but things get weird when Watch's tonsils run off and the trio thinks the hospital's strange nursing assistant may be using removed organs for a sinister plot.

"Scaredy" gets bitten by a vampire and makes Watch, Sally, and eventually, the whole school into vampire slaves. Adam must team up with Principal Blackwater to find the master vampire and defeat it.

Adam, Watch, and Sally go on a camping trip, where a hairy creature who may or may not be the legendary Bigfoot is raiding their campsite.

Sally breaks her mother's lawn gnome and hides it, which causes the other gnomes in her yard to avenge its death.

Adam takes his driver's license test with a neurotic instructor who knows a little too much about dying behind the wheel. Meanwhile, Watch discovers the diary of Dr. Victor Frankenstein and Frankenstein's monster and revives the monster so he can use him to fight back against bullies.

Watch and Adam get stuck in a strange maze, and Sally discovers it has connections with the mayor and his fading memories.

Laurel's memories are sparked. Adam and Ann run from homunculi, while Watch and Sally break into Shadowmire to discover how to defeat the monsters and accidentally discover a shocking truth about the Templeton family that Ann has kept hidden from them ever since Laurel was found.

After finding out Laurel was actually Madeline Templeton bewitched by Ann, Adam awakens to a Spooksville that he doesn't recognize and Watch and Sally are not his friends.