Neighbors in a block wake one morning to find they have been sealed inside their apartments. Can they work together to find out why? Or will they destroy each other in their fight to escape?

Music journalist Andrew Deeley (DAVID GYASI) lives in a high-rise tower block, physically and mentally scarred from a vicious attack. Alone and cut off from the world, he obsesses over Kem (YENNIS CHEUNG), his beautiful Chinese neighbour. When Amy (PIPPA NIXON), a married woman he meets online, witnesses Kem’s kidnapping, Deeley is left with no choice but to find Kem himself. Armed with only an Oyster card and a hammer, Deeley spirals into the heart of the Triad underworld as he searches for a woman the world has forgotten.