When their grandmother dies, Grace and Andrew Easton inherit her sprawling, book-filled London home, Dinmont House. Rather than sell it, the adult siblings decide to move in together. The arrangement is unusual, but ideal for them until the day Andrew brings home a boyfriend. James is a devilishly handsome novelist, but his strident comments about Grace's doctoral thesis puncture the house's idyllic atmosphere. When he and Andrew witness their friend's murder outside a London nightclub, James begins to unravel and what happens next will change their lives.