A Philadelphia couple are in mourning after an unspeakable tragedy creates a rift in their marriage and opens the door for a mysterious force to enter their home.

A detective in a small Pennsylvania town investigates a local murder while trying to keep her life from falling apart.

When Isobel Hetherington and her three young daughters take up their seaside residence in the hot summer of 1887, life seems idyllic. But the arrival of Phillip Wilson Steer for his annual painting visit launches a chain of events that will change their lives forever.