Amy convinces Sheldon to go with her to a Napa bed and breakfast by having dinner on a train for Valentine's Day. They go on the trip with Howard and Bernadette. The romantic night goes bad when Sheldon meets another train lover. Sheldon spends time talking trains with him instead of with Amy. She gets upset with him and he tries to give her what she wants during their fight. He kisses her. Then, he asks her to go with him to help run the train.

Penny and Leonard have a Valentine's Day at home. Raj asks them to look after Cinnamon while he spends the night with the telescope. They agree. Penny gives Leonard flowers and chocolates after she ate some of them. He gave her Lakers tickets to go with someone else. While they were having sex, Cinnamon ate the chocolates. They take her to the vet. Raj shows up and connects with the vet. She gave Raj her number.