A dream holiday becomes a nightmare for a young British couple who seemingly have it all, as heartbreak turns into fury and revenge.

Having just been through a tumultuous breakup, cam-girl Vicky retreats to a friend’s remote cabin in the woods to clear her head. But when the power goes out, she discovers something terrifying awaiting her in the dark — a masked killer who’s hellbent on bringing her night to a grisly end.

Kathryn, a struggling actress and unfulfilled housewife, becomes involved with her new gardener, Ben. As he gives her the attention and sensitivity she craves, they start to fall for each other. But Ben is not what he seems.

Based on the Pretty Little Liars series of young adult novels by Sara Shepard, the series follows the lives of four girls — Spencer, Hanna, Aria, and Emily — whose clique falls apart after the disappearance of their queen bee, Alison. One year later, they begin receiving messages from someone using the name "A" who threatens to expose their secrets — including long-hidden ones they thought only Alison knew.