From the back cover:
Welcome to Poseidon, 2199 AD. Prepare for a compelling journey into humanity's future on a distant planet where life is hard and dying is easy. A world where GEO Marshals enforce the peace and wired mercs patrol deep waters in deadly fighter subs. A place where corporate greed and human desperation ravage an alien ecology, threatening to plunge humanity into a war of survival with an ancient legacy. Welcome to the world of Blue Planet. Whether you are a Newcomer or Native, this guide contains everything a Blue Planet player needs to survive on the new frontier.
A detailed future history of the Blue Planet setting
Introductions to Poseidon, the GEO, the Incorporate, and the natives
Information on the sociopolitical landscape of both Poseidon and the Solar System
The newcomer survival guide
Detailed descriptions of personal equipment and biotechnology
Complete game rules, entirely redesigned for Blue Planet V2.