Although David is mending fences with Keith, it becomes apparent that their relationship still needs some ironing out - and Karla's got a secret that isn't going to make the going any smoother. Claire takes a questionable approach to her new photography hobby, and grapples with a future beyond high school. Ruth is ready to move things along with Nikolai, but he might be happy right where he is. Brenda's engagement anxiety leads her and Melissa on a sexual adventure in unlikely Orange County. Nate assesses his past and opens up to Lisa, but her reaction is far from hospitable.