Four friends - two couples - live together in a house. One morning, Lily notices strange behavior in her boyfriend Luca, like trying to kill chickens and drinking blood. Over the day, Lily, Tom, and Abi see more abnormal things from Luca and realize his teeth look like a vampire's. The next morning, Lily has also turned into a vampire. Fearing for their safety, Abi and Tom try to escape but are unsuccessful, and the following morning they have also been transformed into vampires.