Marin receives an invitation from Stuart to join him on an overnight ski trip. Jack accompanies Lynn to the doctor for a sonogram, and Patrick tells Annie that he once made a donation to a sperm bank. Jane and Sam ("Plow Guy") teach each other some of life's secrets, while Buzz meets someone from his past.

After Lynn's departure, the everyone assumes Marin and Jack will be reunited. Annie and Patrick are having problems planning their wedding, as Celia wonders about the future of her relationship with Dick after she learns he is younger than she is. Meanwhile, Mai's cousin, Lucy, pays a visit to Elmo. But when it's time for her to return to China, Mai wants her to stay. When George offers to marry her, he doesn't realize it could prevent someone else from taking his chance.