Ace would do anything to protect his daughter, Felicia. He lives his life for her and never found another lover after his divorce three years back. But when he goes to his favorite author's book signing and the man drags him on an outing to get out of work, he feels things he's never felt before. 

Before Ace knows it, Milo has found a way into his heart—and into his bed. And Felicia loves him, too. But then Milo becomes distant and Ace learns that he's sunk into the depressive part of his bipolar cycle. Ace realizes he has to be the first person to convince Milo he is worth loving anyway.