Lily, portrayed by Juno Temple, and Alison, played by Kay Panabaker, are two inseparable best friends navigating life in their economically challenged surroundings near the Salton Sea. Despite their close bond, they are starkly different in character: Lily is a troubled soul battling suicidal thoughts, living with her single mother, Margaret, who is portrayed by Leslie Mann. Lily often feels neglected by her mother, while Alison, who has endured her own struggles with an alcoholic father, finds a sense of refuge in her uncle Hogan's automotive domain and by caring for horses.
With a sense of urgency to escape their bleak reality, Lily’s impulsive and rebellious nature drives her to seek adventure beyond their secluded town. They encounter a group of skateboarders from Los Angeles—Louis, David, and Jesse, the latter of whom captures Lily's interest with his charm. In a moment that ignites a mix of emotions in Alison, Jesse kisses Lily and leaves his number scribbled on her arm, which triggers jealousy in Alison.
Influenced by her longing for Jesse, Lily persuades Alison to embark on a journey to Los Angeles in Hogan's truck. Reluctantly at first, Alison eventually agrees, and the duo sets off together. During a stop at a convenience store, Lily finds herself in a compromising position, stealing goods for the two of them, and must intervene to rescue Alison from a sticky situation. Their adventure takes a wild turn as they locate the boys and head to their rundown apartment, inhabited by other homeless teens. Despite Alison's apprehensions about the boys’ intentions, Lily embraces the moment and is determined to enjoy their newfound freedom.
As the story unfolds, moments of intimacy arise, revealing the complexities of their experiences. Lily and Jesse share a kiss in an abandoned house he once called home, prompting Jesse's curiosity about Lily's hidden scars. Meanwhile, Alison struggles with her own feelings of safety and belonging as she contemplates her choices and the dire need to reach home.
The plot thickens when David proposes a scheme that involves using Lily to lure an older man for theft. Caught in a whirlwind of events, Lily complies but finds herself in a terrifying situation that culminates in a violent altercation, leading to a traumatic experience. Just when hope seems lost, Alison returns heroically to rescue her friend, leading them both on a desperate escape.
As they drive away, the two friends find solace on a beach, cherishing their last moments in Los Angeles. It's a poignant reminder of their journey—a blend of hardship, friendship, and resilience that ultimately brings them back to their roots, proving that sometimes, the most vital journeys are the ones that lead us home.
