The year is 1960. While Murry Wilson (Kevin Dunn) relives his musical heyday, his sons, Brian (Frederick Weller), Dennis (Nick Stabile) and Carl (Ryan Northcott) find an escape from their father's abuses by forming a rock and roll band. Fueled by Brian's gifted songwriting and Murry's aggressive management, the Beach Boys quickly find fame and fortune. But as they soon learn, success sometimes comes at an expensive price. On tour without their mother, Audrey (Alley Mills), Murry's abuse grows intolerable. Meanwhile, stage fright, exhaustion and a fragile mental state force Brian to quit touring. He fires Murry and is finally free to become the band's studio genius. But soon, drug use and a parasitic entourage fracture his ties to reality. By the 1970s, after years of drugs, madness and a brush with the Manson family, Brian and the Beach Boys return to the stage to resume their extraordinary careers.