Paul finds a dead human in his house, and it appears that Carl has murdered him. However, the two argue over how the body ended up in their home, and why he has no hands.
Carl has caused an apocalypse by killing everyone in site and eating all the hands possible. But the mask of Paul says that Carl's job is not complete.
Carl seeks out the real Paul only to find that his destruction and mass murder has had a permanent effect on him. After discovering this change of state Carl loses all traces of sanity. He then jumps off a bridge hoping to see Paul again.