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.

Hannah and Janet send Sam on a secret mission that leads to a tragic conclusion; Ronnie and Nick find out The Commander's secret; Ikey and Eddie are angry when they find out Big Cat has been stealing their clients; and Physical Phil plans a date with the pizza girl.

Nick and Hannah bond while waiting for the outcome of Sam's surgery. Eddie tries to deal with the consequences of standing Janet up at their date. Ikey and Alison come to an agreement about their secret relationship. Physical Phil has to find a way to get even with the drunken frat guys that bothered Pizza Girl.

Nick is torn between Hannah and Aubrey, as Aubrey asks him about his and Hannah's relationship. However, an unexpected visitor occupies Nick. Eddie makes a weird response to a "welcome surprise" by his friends. Physical Phil decides to make a huge change in his life. Ray tells Owen about Alison and Ikey's secret relationship.

Nick and Eddie go to New York to try bringing Owen back to Knights Ridge and his family. Hannah has to deal with her true feelings for Nick.

Janet is worried because Eddie and her still haven't slept together. Hannah is put in a tough position when Ray tells her that he wants to adopt Sam. Nick thinks that Aubrey is keeping a secret from him.

Nick, Phil, Owen and Eddie are shocked when they find out that their childhood crush, Angela Ferilli, is dead. They reminisce about the past they shared together and realize how much Angela affected their lives.

A visit from Eddie's ex-girlfriend Rory causes problems in his relationship with Janet. Nick receives a great job offer that should take him far away from Knights Ridge. Hannah is arrested for assaulting Ray's ex-wife Christine.