Who knew love would be her secret weapon? Cassandra Benton has always survived by her wits and wiles, even working for Bow Street alongside her twin brother. When injury takes him out of commission, Cass must support the family by taking on an intriguing new case: George, Lord Northbrook, believes someone is plotting to kill his father, the Duke of Ardmore. Decades before, the duke was one of ten who formed a wager that would grant a fortune to the last survivor. But someone can't wait for nature to take its course--and George hopes a seasoned investigator like Cass can find out who.