Scott falls for the new girl in school, Laurel. Mark deals with his parents breakup and impending divorce, his own suspension from school and the disappearance of his little brother. Anika declares war on Laurel after a nasty comment about her wardrobe.

Cat and Mark try to find their missing little brother. Scott attempts to ask out Laurel. Anika spreads rumours about Laurel. Mark and Laurel meet for the first time. Jen finds Travis, Mark's little brother sleeping in her car. Gil accidently insults Chris. Erin spies Mark and Laurel having coffee together. Cat busts Mark on his email from Laurel.

It's Mark and Jen's six-month anniversary and she plans on having sex with him. When Mark and Laurel are spotted hanging out, Anika and Erin spread rumors about them which hurts Jen and leads Scott feeling betrayed. Laurel apologizes to Jen and confronts Anika and Erin, making them hate her even more. Laurel and Shannon meet. Scott gets drunk and embarasses himself in front of Laurel. Jen and Mark have a romantic anniversary but she feels she's not ready to sleep with Mark who says it's fine. Later that night Cat spies Mark exchanging emails with Laurel.

Mark misleads Jen while falling for Laurel. Scott meets Brenda, the girl of his dreams. Cat reveals to Jen that Mark has been emailing and talking with Laurel behind her back. Erin pines over Chris, who's more interested in Anika. Jen reads Mark and Laurel's emails.

Things get steamy when Mark poses for Laurel's photo shoot and the two share an illicit kiss. When Erin attempts to dissuade Chris's interest in Anika by saying she is having a steamy affair with a grade 12 guy, it only intrigues Chris more. Chris wagers against Gil that Anika will have sex with him. Scott pursues Brenda and upon discovering she's religious decides to become a Druid. Jen becomes increasingly more suspicious of Mark and Laurel and for good reason too.