Quinn, Isabelle, Feeney and Carrie are teaming up for Whistler's annual underground scavenger hunt but Carrie, finally realizing she really likes Quinn, is uneasy about Quinn and Isabelle's budding relationship. Despite a one night stand with Ryan, Nicole makes it clear they're no longer an item. Adrien, his obsession with Nicole growing, continues to subtly woo her. Ethan is not happy to learn that Jen has re-hired Lisa to help cover for a sick waiter. Quinn discovers that A.J. is dealing drugs in the McKaye home and throws him out.