The last time Lucy Sheridan visited her aunt Sara in Summer River thirteen years ago, she'd been sent home suddenly after being dragged out of a wild party by the guy she had a crush on. Now, returning after her aunt's fatal car accident, Lucy learns that Mason Fletcher had saved her from a very nasty crime that night and soon afterward, Tristan, the cold-blooded rich kid who'd targeted her, disappeared mysteriously. Lucy now works as a forensic genealogist, while former policeman Mason runs a security firm. When he and Lucy make a shocking discovery inside Sara's house, and some of Tristan's old friends start acting suspicious, Mason's instincts kick into gear.