On Valentine's Day, a terrible snow storm hits Philadelphia. Perry, who was redecorating Yonk and Nicole's house, has to stay with Nicole and Duncan, and decides to make a meal for them while waiting. Kat and Kyle end up stuck at Ethan's, and Ethan tries to get rid of them to spend time with Palmer. Also, Richie has a lot of trouble trying to come to Lina's.
A group of twenty-somethings who were third-grade classmates are reunited at a surprise party 20 years later. What will happen when they find out what each other's lives are like now?