Five people receive a mysterious invitation to a party on the 27th floor of a skyscraper, with no clue who sent it. With two gatecrashers in tow, they take up the offer, only to walk into a deadly trap set by a murderous psychopath, who forces them through a series of deadly challenges to win their freedom. Horror, starring Georgia Mackenzie and Mark Wilson.

A who-is-it setting in the claustrophobic corridors of an abandoned and locked-off office building that has several guests invited to a party by their mysterious, unknown host. Only it is they who are the victims of their crimes. Suspense and mistrust are not the only stalker in this cat and mouse game of wits and fear. Who is the stalker? Why is he killing? And what is it exactly that everyone here has in common?