When surgeon Seraphina saves a stabbed mafia godfather, Lucian, on the operating table, he becomes instantly obsessed. But when a rival mob boss kidnaps her brother and forces her to steal Lucian's secret ledger, she has no choice but to infiltrate his mansion. Knowing she's a spy from day one, Lucian lets her play her game—refusing to harm a hair on her head. As dangerous mind games turn into fierce passion, Lucian wipes out the rival syndicate to save her brother. Domesticating his dark impulses, the ruthless don marries his surgeon, building a powerful family together.