Welcome to "The O.C.," where the lives of a group of friends and families have forever been changed by the arrival of an outsider to their affluent ocean-side community of Newport Beach in Orange County, California. In season three, Kirsten befriends a mysterious woman in rehab. Strapped for cash, Jimmy returns to Newport Beach and even tangles with Julie again--but he's in way over his head this time. After the shocking events at the end of her junior year of high school, Marissa finds herself in the role of a princess who has definitely been knocked off her pedestal, further straining her relationship with Ryan. With Marissa temporarily brought low, Summer's got some new competition for social chair. And although his marriage with Kirsten may be on the mend, Sandy may have to embark on a brand-new career as a result of the changes in Kirsten's life.