Cassandra leads a quiet life managing her beloved library in Queens, NY, but no matter what she does, she has never been able to come to terms with the disappearance of her thirteen-year-old sister the night their father died. Cassandra, only a child herself at the time, can barely recall the events of that night and as the years pass, Cassandra is certain something terrible happened. With her repressed memories locked deeply in her mind and desperate to find answers, she hires a private investigator, but when he turns up dead, it becomes clear someone doesn't want her looking into her family's past.

When wealthy businessman Jackson Evans stumbles into her life, with problems of his own, they realize his family and hers are inexplicably entwined in a web of deceit and murder spanning decades.

One by one, everyone who was at Cassandra's childhood home the night of her father's death begin to die under suspicious circumstances. Now they find themselves caught in a race against time to uncover the truth before she becomes the next victim.