After the gang spends hours picking out the perfect Christmas trees, they devise a special plan to help Johnny. Meanwhile, the holidays bring out a somber Summer who misses her mother, and Johnny's desperation leads him to take extreme action and attempt armed robbery to get the money he needs for surgery. Kirsten puts the past behind her and reaches out to Julie Cooper, and when a reminiscing Seth vows to put a little "mukkah" into Ryan's "Chris", Ryan gets Bar-Mitz-vahkkahed on the third annual "Chrismukkah" episode of The O.C.