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.

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.

After their illicit kiss, Laurel tells Mark she can't be with him when he's still with Jen. Mark tells Laurel he will break up with Jen. While feeling she may be losing Mark, Jen contemplates having sex with him in order to keep him. Scott throws an Equinox party. Craig leads a one-man protest at the Cafe Java but when he chains himself to the table and insults Maggie, she leaves him there overnight. When Anika hears the ""torrid affair"" rumours going around about her, Erin tells her it was Laurel who started them (when really it was a jealous Erin). Laurel and Jen work uncomfortably on a school project together. Mark goes over to Jen's to end things with her but they end up having sex. When Mark falls asleep, Jen is left looking very unsure of herself.

Erin and Chris go out on a date, but to Erin's disappointment, all Chris really wants is Anika. Laurel tells Jen about her and Mark which causes Jen and Mark to argue about Laurel. Scott asks out Brenda. Craig and Laurel work on a Save the Frogs campaign.

Mark tells Jen the whole truth about him and Laurel. Anika learns about the bet that Chris and Gil have going on her. Erin is once again rejected by Chris. Anika and Erin declare war on Chris after they mend their friendship. After Chris's rejection Erin is led straight into the waiting arms of Gil.

Jen breaks up with Mark. Erin blows off Gil after their makeout session. Chris spreads rumours about Anika as does Gil about Erin. Cat distributes teacher evaluations. Shannon and Laurel decide to be friends. Jen's brother Derek gets arrested. Scott wants to change his relationship with Brenda.