After Thanksgiving, Anna (recurring guest star Samaire Armstrong) and Summer (recurring guest star Rachel Bilson) remain upset with Seth for his behavior on the holiday, and Seth struggles to reconcile with them. Meanwhile, Julie (recurring guest star Melinda Clarke) has relationship problems of her own. Jimmy and Sandy team up to tackle Jimmy's legal issues. A secret indiscretion by Kirsten is exposed. Ryan and Luke become partners on a history project, and an astonishing revelation creates an unexpected alliance between them.