The Clan Wars continue. During the final stage of the invasion of the Inner Sphere, Clan Cat is tasked with sharing the offensive corridor with Clan Jaguar. Having stolen several planets from the Jaguars, they went far into the Inner Sphere. When the Tokkaido Treaty expires, the Cats will have to race the Jaguars to Terra. But the Smoky Jaguar Clan does not want to give in to the Cat Clan: based on its best genetic material, it creates a secret army of “Tau”, the appearance of which in the Inner Sphere means that the time has come to reap the bloody harvest.