Bonnie is depressed about all the losers she's been dating lately, so Ben and Danny decide to turn her love life into a contest - whoever sets her up with a decent guy wins. Determined to beat his big brother at something, Ben sets Bonnie up with one of his customers, Frank, while Danny sets Bonnie up with Ben's boss, Henderson. After each brother does everything to make sure his man wins, it quickly becomes clear that Frank and Henderson have their own set of problems. Meanwhile, Riley and Tucker find themselves unwittingly involved in neighbor Sondra's marital troubles.

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.