A run-down tower block scheduled for demolition becomes the unexpected prison for its last remaining residents. After witnessing the brutal murder of a teenager, they fearfully agree not to reveal the identity of the killer to the authorities. This decision haunts them when, seemingly out of nowhere, they find themselves targeted by a relentless sniper. Trapped on the upper floors, the residents must use their wits to survive while questioning each other's true intentions.

As the siege continues, desperation grows among the group. Food and water become scarce, and tensions escalate, exposing long-hidden secrets and creating divisions among them. The group experiences a cat-and-mouse game with their unseen assailant, forcing them to collaborate in creative ways to outmaneuver the sniper's deadly accuracy. Desperation leads them to attempt daring escapes and form unexpected alliances, but survival becomes less certain with each passing hour.