As Bobby Keller embarks on a fateful night drive through a shortcut, he unexpectedly crosses paths with Lainie Diamond, the girl he's recently grown fond of. At the same time, the elderly professor Coleman Ettinger is immersed in a quest with his wife Gena to master the art of meditation in their serene backyard sanctuary, aiming to unite their minds for an eternal bond. However, destiny takes a twist when Bobby's reckless actions lead to a collision with Lainie, leaving both high schoolers unconscious and triggering a surreal series of events that merges the consciousness of two distinct pairs: Coleman and Gena find themselves ensnared in the bodies of Bobby and Lainie.
Upon awakening in Bobby's bedroom, Coleman is met with bewilderment and confusion. His best friend Dinger and parents are anxiously inquiring about his condition, but “Bobby” is lost, having completely detached from his own identity. Attempting to regain control over this unusual situation, Coleman adopts the persona of Bobby Keller, exploring his new environment with a blend of curiosity and desperation. He becomes increasingly fixated on reuniting with Gena, only to face mounting frustration as he struggles to grasp the bizarre reality that has enveloped him.
As Coleman succumbs to sleep, his subconscious conjures a dreamscape where he encounters the real Bobby Keller, who is caught in a limbo partially shaped by Coleman's own psyche. The trapped Bobby delivers a grave warning: Gena, who was initially skeptical of her husband's "dream state" theory, has found herself ensnared alongside Lainie in a shared dream, running the risk of being eternally lost within its convoluted pathways. With time slipping away to avert this looming disaster, Bobby implores Coleman to devise a way to rescue Gena before she forgets him entirely and goes missing forever in the dream's depths.
In his new identity as Bobby, Coleman faces a complicated dilemma. The real Bobby claims to hold the key to reversing their peculiar situation but hesitates to provide assistance, finding comfort in the dreamlike existence he's come to inhabit. This otherworldly realm, spawned from the chaos of his troubled teenage years, has become more enchanting than the harsh realities of the world he once lived in. Meanwhile, Coleman’s time is running short; he must traverse a complicated landscape of generational divides, navigate the dynamics of high school cliques, and confront personal fears to effect meaningful change in Bobby's life.
Matters become even more critical with the looming threat of Joel, Lainie's aggressive boyfriend, whose violent outbursts pose a serious risk to the fragile equilibrium. Bobby's connections with his family and friends also require healing, alongside his tense relationship with Lainie, who has her own grievances with her counterpart. For Coleman to succeed in this intricate rescue mission, he must skillfully orchestrate a blend of elements while persuading Lainie to replicate the meditation experiment that might just save both Gena and Bobby's relationship.