Catherine is tired of struggling musicians befriending her just so they can get a gig at her Dad's famous Manhattan club, The Underground. Then she meets mysterious Hence, an unbelievably passionate and talented musician on the brink of success. As their relationship grows, both are swept away in a fiery romance. But when their love is tested by a cruel whim of fate, will pride keep them apart?

Chelsea has always believed that her mum died of a sudden illness, until she finds a letter her dad has kept from her for years - a letter from her mum, Catherine, who didn't die: She disappeared. Driven by unanswered questions, Chelsea sets out to look for her - starting with the return address on the letter: The Underground.