Papyrus decides to execute his own genocide route in order to overpower the human and stop their murder spree. Sans, however, was aware of this plan, and searched for his brother. Sans eventually encountered Papyrus, and tried to change his ways. Papyrus didn't listen, and Sans was forced to kill Papyrus. Sans, distraught, stayed in place crying until River Person arrived. At first, Sans thought River Person was crazy as well, however, as soon as their knowledge. He started to kill more monster.