Hokage: A long time ago, a demon fox with nine tails existed. When one tail was swung, it would destroy a mountain and cause a tsunami. To counter it, the people gathered shinobi.
First Ninja: Hold it here until the Fourth arrives!
Second Ninja: Don't let it get any closer to the village.
Hokage: One shinobi sealed the monster in a life or death battle and died. That shinobi was known as the Fourth Hokage.