Lady Lillian Bourne is re-entering society after her disastrous elopement four years ago and is obliged to be the very picture of propriety. But when she finds herself locked in a library with an enigmatic stranger during a party, she risks falling from grace for a second time. After years working as a spy, Lord Damien Northfield finds London tedious - until his encounter with the lovely but notorious Lily. When he's enlisted to investigate a scheme of blackmail and murder, he's thrilled to find he may be the key to discovering a ruthless killer.