Private Investigator Sienna MacArthur may have questionable methods, but she does what it takes to get the job done. While working a case for a friend, she unwittingly stumbles right into Carson Irish’s undercover operation. Right from the start, it’s clear they’re polar opposites. She’s whimsical; he’s serious. He’s by the book; she never met a rule she didn’t break. When it becomes clear that Sienna has bitten off more than she can chew, Carson is the only one who can save her from the danger she’s unleashed.