Tucker's latest failed relationship prompts him to focus on the one that got away -his college girlfriend, Olivia. In an effort to cheer their friend up, Ben and Danny track Olivia down in the hopes of reuniting the lovebirds. When Tucker sees Olivia, he's definitely surprised, especially when he learns they are still married! Olivia promises to sign the divorce papers - but only if her unlucky husband hands over his apartment in exchange. Meanwhile, Riley is tired of being passed over for a promotion, so she takes Bonnie's advice and uses her corporate card to network and pull in new clients. But when Riley's overspending gets her in trouble, she must find a way to save her job.

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.