Ryan and Seth are discussing the possibility of a baby when Theresa walks out of the doctor's office. Back in the Cohen's kitchen, Kirsten is politely - seductively - asking Sandy to forgive her father. At that moment, the kids enter the room and Theresa admits that she's pregnant.
At school, Ryan tells Marissa that he wants to help Theresa if the baby is his, but he also wants things to work out between the two of them. In Caleb's office, Sandy confronts his father-in-law, only to learn that the Newport Group is on the verge of bankruptcy and Caleb is being investigated by the district attorney. Meanwhile, back at the pool house, Marissa tells Ryan that she is not going to have the abortion.
At lunch the following day, Kirsten reveals to Theresa that she had an abortion years ago. Theresa considers her options and changes her mind, telling Ryan later that she is going to have the baby after all. After hearing this news, Seth attempts to sell his boat in order to help Theresa, but he cannot find a buyer. Then, it's the wedding rehersal dinner; Caleb makes a speech, thanking everyone for being there, but Ryan feels uncomfortable and leaves the table. He, Marissa, Summer and Seth wander down the beach and Ryan says that he has to return to Chino and help Theresa.
The episode ends with a classic musical montage. Ryan is in the car, heading back to Chino; Kirsten and Sandy cry over their loss; Marissa takes a swig of alcohol from the deck of Caleb and Julie's new mansion; Seth, in the end, leaves a note for his parents and Summer and sails away.
"The Ties That Bind" File: