Odessa Bell has used her share of an invented tenant's compensation to help her daughter study. Ruth wants dental work, Iqbal needs new sewing motors, Tamsin is saving to move, and Felix would rather not explain every pound. Their reasons are different. Their signatures are on the same lie.

On Monday night, a stranger calls himself Leon Vale and unlocks the vacant flat. By Tuesday he has named his price: their real compensation payments, plus the money already spent. A working camera and an overlooked route above the ceilings give him ways to watch, threaten and intrude.

Finding his real name is only the beginning. With a Friday deadline approaching, Odessa must give up the protection of their false claim while helping neighbours who no longer trust her judgment. A staged departure and a damaged roof turn the final hours into a struggle to leave the building alive.

This complete eight-episode first season answers who the stranger is, how he acquired their invented identity and what ends his immediate threat. The residents' choices continue to cost them after the danger passes.