Locked In With the Killer Next Door

When her AI butler warns of a murderer inside her smart apartment complex, Harper thinks it’s a glitch—until she sees the headless corpse on the rooftop cam. With every resident a suspect and the building on lockdown, the killer is hiding in plain sight—and Harper’s odds of survival are dropping fast. The worst part? The murderer is one of her neighbors in the group chat, and someone just texted: Don’t trust anyone.