Be careful of the ones closest to you… London cycle courier Astrid Bell has known most of her housemates for years but while they have a tangled history together—romantic pairings one-night stands friendships—they each have secrets Astrid is on her way home one day when her neighbor accidentally knocks her off her bike Suffering a few bruises her roommates help her home The next day they learn that same neighbor was bludgeoned to death only hours after the accident Each of them tells the police what little they know and are dismissed Then a few days later Astrid is asked to pick up a package from a wealthy woman called Ingrid de Soto When she arrives the client is lying in the hall of her luxurious home—and it’s apparent she’s also been murdered For the police it’s more than bad luck For Astrid and her six housemates it's the beginning of a nightmare: suspicious glances bitter accusations and a growing fear that the worst is yet to come As the difference between friend and stranger gro