Everyone's but a hired hand meant to kill time between explosions and set pieces and battles that pit the living against the undead. It's pointless to encapsulate the plot, because there isn't much of one. There is one brief foray into the jungle, a most pleasant diversion if only because a good chunk of the cast gets annihilated by what appear to be zombie Ewoks. The Mummy Returns is that sequel that's simply unnecessary, a movie that exists only to take your long green without giving anything in return. When The Mummy Returns mints a fortune, we'll no doubt get a third installment in which all the actors are computer-generated, replaced by ones and zeroes.
Audiences get what they deserve.