On the evening of Horseshoe Bay's annual Harvest Carnival, a whole new mystery unfolds for Nancy and the Drew Crew when a body is discovered on the Hudson carnival grounds.

Sparks fly between Nancy and her counterpart in law enforcement. Meanwhile, Carson and Ryan have conflicting opinions on parenting Nancy, Nick's and George's relationship is tested, and Bess tries to protect Ace from a string of bad luck.

The crew races to protect everyone in town from a supernatural threat causing terrifying life-threatening sleepwalking experiences. Nancy's unspoken feelings for Ace resurface. George is shaken by an unwelcome friend request.

The crew goes on a hunt for an underground prison that may hold answers - all while following a lead that could cure George of the paranormal affliction shortening her lifespan. Ace tries to enlist Amanda in bringing her father to justice.

While Nancy and her friends race to find a relic that could finally untangle George's soul from Odette Lamar's, Carson and Ryan are affected by a mystical substance that prompts a temporary return to the lowered inhibitions of adolescence.

The fate of Horseshoe Bay rests in the hands of the Drew Crew, who must find a way to defeat their most powerful nemesis yet. Lives and hearts are in supernatural jeopardy - and a star-crossed choice will change everything, forever.

Nancy launches a new investigation to find a group of missing bodies from Horseshoe Bay's cemetery that have been dug up and stolen - or have possibly risen. As Nancy is drawn into this ghostly case, a string of unexplained paranormal crimes leads the Drew Crew to believe that the literal sins of the town's past have returned to haunt the living. Meanwhile, Nancy struggles with yearning for Ace, the man she loves. But when a slow-burning attraction begins between Nancy and the son of Ryan Hudson's newest enemy, Nancy must decide whether this love interest is worth the ire of both her father and Ace - whose own heart may be tempted by a new relationship too.

Nancy and Ace share a sweet moment while working together to find a way to break the curse. Meanwhile, Carson and Jean continue growing closer, but a recent conversation leaves him with an unsettled feeling. Lastly, Jesse and Birdie devise a plan to teach the school bully a lesson.

The Drew Crew discovers a clue in an unexpected place and call in someone from George's past to help find answers.