Young heiress Scarlett Lancaster is delighted when her father tells her he hired a famous pop star and former boy band member to play at her eighteenth birthday. But delight becomes utter disappointment when it turns out he wasn't talking about Harry Styles. No, Scarlett's dad hired Tate Ramsey, former lead singer of the band Five Car Pileup, who hasn't been popular for years.

Tate, after years of alcohol- and drug-fueled partying, is sober and ready for a comeback. He is in top form at Scarlett's party and blows the audience away with his performance--though Scarlett herself still isn't impressed. But when they talk after he leaves the stage, their encounter ends in a kiss that surprises them both--and immediately goes viral.

The viral kiss and the video of Tate singing at the party do wonders for both of their burgeoning careers. So after some careful negotiation, the two of them agree to start a fake relationship. But before long they discover their feelings might not be fake after all ...