For the women in London, the "chance of a lifetime" may prove to be their last.

Hidden among the romantic rendezvous and secret messages in The Times of London's Personal Column, a peculiar ad offers one young woman the opportunity of escape: travel, adventure, and a new life-no questions asked, all expenses paid. It seems too good to be true.

For Gwen, Charolette, and Lizzie, it was. Each woman responded. Each disappeared without a trace.

Mikaela Forsythe, no stranger to risk herself, agreed to look into the disappearances as a favor for a friend. What she discovers is chilling: none of these women left London. And an unsettling pattern suggests there may be others.

When the ad reappears, Mikaela devises a dangerous plan-she'll answer it herself. It's the only way to find out what really happened. But taking the bait and risking her safety puts her at odds with Brodie, her closest ally.

As Mikaela steps into the unknown, she finds herself entangled in a mystery far darker than she imagined-one that threatens to claim her as its next victim.