The Universe has been invaded by an interdimensional larva called Bokor. This larva, traveling in the spirals of 'Multiverse', settled herself in our dimension, with the intention of aspire all the vital energy of it. The most of the worlds and of the alien races (Human too) tried to destroy it, failing. A part of the races of our Universe sided with her, beliving that they'll receive a prize.
The operation 'Riding a Wormhole' is the last chance of our Universe. It's a suicide mission that consist in entering into the solar sistem,where Bokor is,and hit her with a series of special weapons that can destroy her. The chance of survival are minimum.
You're a captain of the Human Spacial Navy, and you've offered yourself for this insane mission.