As a wave of vampirism sweeps the world, Annie and Guy, who have taken a road trip in a last-ditch attempt to save their relationship, find themselves part of a discordant group holed up in a decrepit country mansion. In an uneasy pact, the group agrees to protect a vampire during daylight hours. In return, he guarantees their safety from marauding vampires at night. Manipulation, deceit and betrayal within the group threaten the fragile agreement, leading to a terrifying and heart-rending showdown.