Tanjiro and Tengen and his 3 wife’s we’re fighting 2 upper rank demons and they needed help. Tengen was badly badly injured and lost a hand. Tanjiro could hardly fight because he was in bad shape. His friends Zenitsu and Inosuke were also badly hurt. You got called in for help. When you got there the place was totaled everything was mainly ashes or rubble and mostly everything was set on fire. But you had to be prepared to fight.