After a night of fun, Abby was responsible for the car crash that killed her beloved brother. It is a sin she can never forgive herself for, so she pushes away the man she loves most, knowing that he would eventually hate her for what she's done, the same way she hates herself. Twenty years later, Abby's husband, Nate, is also living with a deep sense of guilt. He was the driver who first came upon the scene of Abby's accident, the man who pulled her to safety before the car erupted in flames, the man who could not save her brother in time. It's this guilt, this regret that binds them together. They understand each other. Or so Nate believes. In a strange twist of fate, Liam (her old lover--possibly her true soulmate) moves in with his own family next door, releasing a flood of memories that Abby has been trying to keep buried all these years. Abby and Liam, in a complicit agreement, pretend never to have met, yet cannot resist the pull of the past--nor the repercussions of the dark secrets they've both been carrying...