What's the fastest way to put the brakes on a cruise-controlled bachelor lifestyle? Fatherhood? Guess again. Successful restaurateur and man-about-town Jimmy Martino is used to being the most suave, most handsome and most single person in the room. All that changes with the surprise appearance of Jimmy's adult son, Gerald, and his baby daughter, Edie. Now Jimmy has to unlearn a lifetime of blissful selfishness and grapple with the fact that he went straight from single to grandfather in six seconds flat.
Keeping tabs on Jimmy is Gerald's mother and Jimmy's former girlfriend, rocker chick-turned-mother Sara. Equally concerned about how Jimmy will manage these new developments is Jimmy's restaurant family, especially assistant manager Annelise and chef Ken. Can Jimmy teach Gerald to be a little more like him in order to win the affection of Edie's hot mess of a mom, Vanessa? Will Jimmy and Sara fall for each other all over again, even though she's the one thing he never dates - a woman his own age? And who's higher maintenance, Jimmy or the baby?