When twenty-something Ben finds a surprise on his doorstep, a baby girl, he decides to give parenting a shot with the help of his friends and family.
Ben and the boys come up with a foolproof babysitting schedule, but miscommunication and other priorities cause their plan to fall apart.
Riley feels threatened by Ben's new relationship with Emma's nurse, Cassie, especially when Cassie makes it clear there's only room in Ben's life for one girl. Tucker destroys Danny's lucky hockey jersey before a big game.
Bonnie spends all her time with Emma, disrupting the boys' routine. Riley goes on a date with fellow law student, Jack, and Danny has a hard time pretending he doesn't care.
When Ben hears of an open management position at the bar, he enlists Riley's help to prove to the owner, Henderson, that he’s responsible enough for the job. Tucker and Danny exchange the super-girly stroller Bonnie bought for a much cooler one – one that seems to be a total girl magnet.
After winning their first game, Ben’s softball team votes for Riley to replace Ben as team captain. Riley takes the role much too seriously, and the team asks Ben to set things right. Danny learns that Bonnie is dating his hockey coach and plots to break them up.
Ben and Tucker are at odds when they start seeing the same girl, Ava. Riley coaches Danny in public speaking, prompting Danny to debate telling her how he feels. Bonnie tries online dating.
A super mom inspires Ben to clean up his act; Emma's grabby hands get Bonnie and Riley in trouble for shoplifting.
Ben tries to bring everyone together for Emma's first Christmas photo.
Riley helps organize the perfect wedding for her childhood friends. But when Ben and his wild buddy Gene go out all night, Ben ends up waking up next to the bride... on her wedding day! Meanwhile, in their haste to help, Danny and Tucker end up dropping the wedding cake and Bonnie tries to document the event on film, if only she can remember to turn it on. The romance of the wedding brings Riley a little closer to one of the guys... but is it Ben or Danny?