Riley realizes that she hasn't met any of Ross's friends and decides to throw a cocktail party so she can get to know them. Ross confronts Ben about his not-so-secret feelings for Riley and tells him to back off; in fact, don't even come to the party. Not one to take orders, Ben crashes the party, but the night quickly takes a wrong turn when the boys get into a fist fight and a very drunk Tucker spills a few more secrets. Danny realizes he knows nothing about his new girlfriend, Ashley, and goes to great lengths just to find out her last name. Will Danny be able to save his relationship once she figures out how little he knows about her? Meanwhile, Bonnie has some serious explaining to do when a valuable item goes missing.

Baby Daddy follows Ben, a young man in his early 20s living the life of a bachelor in New York City with his buddy, Tucker, and his brother, Danny. Their lives are turned upside down when they come home one day to find a baby girl left on the doorstep by an ex-girlfriend of Ben's. After much deliberation, Ben decides to raise the baby with the help of his friends and his protective and sometimes over-bearing mother, Bonnie, and his close female friend, Riley.