Although they still intend to "play it slow" romance-wise, Ryan (Ben McKenzie) and Marissa (Mischa Barton) prepare for their first real date. Meanwhile, Summer (Rachel Bilson) continues to play coy with Seth (Adam Brody), driving him ever closer to Anna (Samaire Armstrong). And Seth's mother, Kirsten (Kelly Rowan), wonders if husband Sandy (Peter Gallagher) is seeing another woman. A great deal is ultimately revealed -- if not resolved -- during a lavish O.C. charity event.