Sometime in the near future, the South American rain forest serves as the backdrop of a war between two factions - those who support the Baldr governing technology and those who don't. To ensure that the skirmishes and conflicts don't expand, the BS-OSA or Baldr System - Observation Structure Army is set up to police the region. Inside the Army is a special unit known as SERR14 (Observation Structure Army South American Experimental Riot Regiment the 14th) which is comprised of elite soldiers and operatives such as Sergey Kirkland and Dullahan Cuningham.

[From Game Manual]