The story centers around Nathaniel Nucci, who leaves the military when his wife becomes pregnant hoping to lead a "normal" life. All is well for 13 years until his wife and child are part of collateral damage on a botched Mafia hit. Blinded by rage, Nathaniel infiltrates the Mafia organization responsible for the murder of his family. He ultimately becomes a contract killer for the head of one of Philadelphia's largest Mafia families, while keeping his identity hidden.
When a sweet and quirky grad student falls for a street-tough stockbroker on New Year's Eve, it takes twenty years of ups and downs, ins and outs to discover why. And to discover that, just maybe, they're not so different after all.