Seasoned musician Jackson Maine discovers — and falls in love with — struggling artist Ally. She has just about given up on her dream to make it big as a singer — until Jack coaxes her into the spotlight. But even as Ally's career takes off, the personal side of their relationship is breaking down, as Jack fights an ongoing battle with his own internal demons.
When her mother falls for a wealthy man, Lina Cruz must move in with her new stepfather and transfer from an urban East Los Angeles public high school to an exclusive prep school in Malibu, where she struggles to fit in with her affluent new peers. After snooty cheerleading captain Avery blocks Lina from varsity, Lina recruits her best friends from her old school to help her whip the pathetic junior varsity cheerleading squad -- the Sea Lions -- into fighting shape.
Tom, greeting-card writer and hopeless romantic, is caught completely off-guard when his girlfriend, Summer, suddenly dumps him. He reflects on their 500 days together to try to figure out where their love affair went sour, and in doing so, Tom rediscovers his true passions in life.