Let's Go Hunting!

what happens

Josuke suddenly gets invited to go hunting by Jotaro. The purpose of this hunting trip was to hunt down the rat that gained Stand abilities after Akira Otoishi shot it with the bow and arrow. As they trace the rat to a drainage canal, they see a clump of fourteen rat corpses fused together. They realize it's probably the work of the rat that they're after and follow it to a farm, and...