10 years after leaving his hometown, Nick Garrett returns to Knights Ridge, to teach a one-day course at Dufresne College, which he believes is a great way to find out what changes since he was gone. After hurting the ones he loved by writing a book, a best-selling novel, and discovering their secrets, Nick will have to find a way to confront past demons and move on with his life. Nick decides to stay after discovering that his ex-girlfriend, Hannah Daniels, has a 10 year old son named Sam who has a peanut allergy... just like all of the men in the Garrett family.
Nick decides to stay in Knights Ridge and tries to convince dean Leslie Etwood to give him a job at the local college, but things keep getting in his way. In a way to get back at Nick for leaving years ago, Eddie pursues Aubrey. Ikey isn't pleased to see Alison and Owen on an annual date. Hannah is mad at Nick after realizing The Commander came in the Veterinary Care with a silly excuse, only to find out if Sam is Nick's son or not.
Nick has an opportunity to get closer to Sam when Sam asks his advice to impress a girl he likes. In doing so, Nick begins to feel like a father and ends up using a technique from his novel to help Sam get the girl. Meanwhile, Phil feels a spark when he meets the pizza delivery girl in unique circumstances. Elsewhere, Janet the Planet worries that Eddie is embarrassed to be with her in public during their first date; and Ikey continues to have an affair with Owen's wife.
Nick and Ronnie uncover why The Commander is unusually upbeat, and are both shocked by the reason. Physical Phil sets up a romantic dinner for his date with the Pizza Girl. Ikey and Eddie are furious when they discover that Big Cat has been stealing clients away from them. Meanwhile, Janet the Planet and Hannah send Sam on a secret scouting mission, but are horrified when it leads to tragic consequences.
Nick and the guys sit at the hospital with Hannah as they nervously wait for the results of Sam's emergency surgery. As time ticks by, Nick does his best to comfort Hannah and in doing so the two have a chance to reconnect. Meanwhile, the Pizza Girl is accosted by drunken frat members and Phil has to find a way to defend her without leaving the house. Elsewhere, Ikey and Allison decide what to do about their affair, and Eddie has to face up to standing up Janet.
When Aubrey begins to think that Nick still has feelings for Hannah, she tells him that he has to choose between her and Hannah. However, Nick's choice becomes more complex when an unexpected visitor shows up at Hannah's. Meanwhile, Nick and the guys plan a surprise for Eddie, but Eddie's response isn't what they had hoped. Ray continues his quest to destroy the gang's relationships by revealing Ikey and Alison's affair to Owen and Physical Phil is forced to make a life-changing move to win Pizza Girl back.