The Human knows and has the tecnology to access where the source of the Digital Worlds power, but not the army to protect him from digis on the way.
So the Evil dude agrees to help and take only a share of the power - in the end he tries to kill the bad guy ;D-
I mean, the Digi9tal World is digital, meaning made of data, so it SHOULD need servers to sustain it. But, there are no servers in the Real World sustaining it, so the bad guys goes look for the servers that sustain the digi world inside said world, and its power source.
How about it?