What's the storyline ensue?

The storyline begins with cut scenes of your character on an operating table. You find out you've been tested on with a new chemical known as Mutagen. Your then brought outside the domed city you once lived in, and dumped at an experiment plant outside. you manage to escape, and in doing so, release knowledge of your powers.

The storyline develops nicely. There are 4 factions that control the domes, and there is a "rebel" faction outside.

You start out joining the Rebel faction, but then by doing things differently, can ultimately lead to different factions.

This Q&A was found on Project Mutagen : http://projectmutagen.com.net.sc/modules/smartfaq/faq.php?faqid=2