When two female friends decide to try their hand at a storage locker auction, they unwittingly inherit a locker belonging to a dangerous serial killer. They soon find themselves in a desperate race to uncover the truth about the locker before the killer tracks them down.

When a group of teenagers receive an invite to download the latest smartphone app, an intelligent personal assistant, they expect a harmless way to get directions and restaurant recommendations. But the sinister nature of the app soon reveals itself, tormenting the friends by tapping into their darkest fears.