Undercover cop Cassidy Blake's top priority was to infiltrate mercenary millionaire Derek Mansfield's life--and take him down. Cass expected to find a ruthless criminal; instead she found a darkly magnetic man whose bone-melting intensity blurred the line between her duty and her own desires. Derek Mansfield had returned to Chicago to settle a score, not to become entangled in a seductive game of cat and mouse with the intriguing Cass. But the secrets in her eyes and her searing kisses had made him hungry for more than revenge. Could either of them risk their hearts in this perilous game of smoke and mirrors?