Abby and Chris find an anonymous note at school. Abby realizes the author and intended recipient had sex the night before and in true Abby fashion, she sets to expose the affair. Working from clues about Joey's night of nude sketching with Jack, Dawson's steamy stop over at Jen's and Pacey's bed and breakfast trip with Andie. Abby calls together her list of suspects and reveals the dirty secrets of Capeside.