Bonnie has a very important job for Ben, Riley, Danny, and Tucker, which prompts them to think about their own lives. As their assignment goes wrong at every turn, Riley thinks about being in love with both Ben and Danny. Danny can't shake his never-ending feelings for the girl of his dreams, and Ben is determined to win his ex-girlfriend back. Meanwhile, Bonnie makes a decision that frustrates everyone.

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.