At Marigold Cottages, landlady Mrs B only rents to favoured tenants, and they're an eccentric (read: odd, slightly broken) bunch. There is anxious playwright Sophie, agoraphobe Hamilton, single mum and sculptor Ocean, perfectionist Lily-Ann, and the mysterious Nicholas. Their quirky community is upended when ex-con Anthony moves in and a dead body turns up on their doorstep shortly after. The police arrest Anthony, but Mrs B, convinced of his innocence, confesses instead. Horrified, her tenants form the 'Marigold Cottages Murder Collective' to clear her name. When a second body appears, they discover every resident has something to hide - and the killer may be closer than they think.