Denis Leary delivers an outrageous funny performance as Johnny Rock, the leader of a hard-partying and wildly dysfunctional '90s rock band called The Heathens. Now, decades later, Johnny's out of work, money and options... until he meets Gigi, a sexy, supremely talented young singer who wants to reunite his band and lead them back to the top. There's just one catch-- Gigi is the daughter Johnny never knew he had. To make it work, Gigi will push Johnny to give up the spotlight and his wild ways and become a rockstar father.