Kirsten's father, Caleb Nichol, comes for a visit along with his new girlfriend, Gabrielle, a 24-year-old fashion model. Kirsten finds her job in jeopardy. To Ryan's disappointment, Luke decides he wants a second chance with Marissa, but she chooses Ryan. Ryan makes out with Gabrielle in the pool house, so Marissa lets Luke be her "first". Summer makes a move on Seth.