Marin is surprised not only by the birthday party that the people of Elmo are throwing her, but her younger sister shows up as well. Her sister immediately has the hots for Jack and wants to marry him. Marin is left feeling insecure by her sister, because all the attention is now on her. Buzz informs Patrick that he found a plane on the mountain while he was out flying. The plane belongs to Patrick's dad and it went down over 26 years ago. Patrick starts to wonder if it is possible that his father survived the crash somehow and is still out there. Sara is officially dating Ben now, and that makes Theresa mad.