The O.C. (2003)

S2E19 The Rager

On Trey's 21st birthday, Marissa eagerly plans a big bash at the Cooper-Nichol mansion, hoping to strengthen the bond between Trey and Ryan. The party quickly escalates into a wild celebration. Meanwhile, Seth finds himself in trouble with both Summer and Zach, but the reasons are unclear. Sandy is keen to maintain his friendship with Carter, leaving Kirsten feeling puzzled. At the same time, Julie reconnects with an "old" friend, which prompts her to reflect on past experiences and consider new possibilities.