Ben can't stop crying in Monica's hands, and Joey and Chandler make fun of her because of this. She gets back at them by throwing their basketball out of the window. Ross has an allergic reaction to Monica's kiwi-lime pie, and Chandler and Joey volunteer to baby-sit Ben while he and Monica head to the hospital.
On the streets, Chandler and Joey are tending to the baby, when a beautiful woman notices them with him. She also, however, mistakes them for a gay couple. Things go quite differently with two other girls, who the boys ride the bus with. Just they all agree to go have drinks, the guys notice that they don't have Ben. With a look of horror at each other, they realize that they left him on the bus. They try to catch the bus again, but are left flabbergasted when the bus is joined by two other identical buses on its way away.
After phoning Joey and Chandler, they finally find the baby at the Department of Human Services, but are left stricken when they have to pick the one from two identical babies. Luckily for them, they pick the right one. This they recognize when he starts crying again in Monica's hands. Ross thinks it's time to change his diaper, but sees "Property of Human Services" on Ben's butt. Chandler holds Ross off with a slice of kiwi-lime pie while he yells: "Run, Joey, run!"
