Girlfriend sky takes boyfriend Chris’ phone. Sky kills her roommate Lisa.

Lisa's text thread with a guy she's been dating takes an unsettling turn (told entirely through screens).

A psycho girlfriend, Tracy, moves in with her boyfriend Scott and his two roommates, Cam and Dan, only to start targeting them when they get in the way of her plans for the perfect relationship.

Five years after, Sky is reunited with her high school friends through Sanya and Kenjie's engagement. However, things head south when Z suddenly disappears, with Sky and her loved ones being targeted by a vengeful puppeteer.