The race of quarrians has a custom - when reaching the specific age young quarrian is being sent out into the galaxy and not enabled to find back without bringing some extremely useful innovation for the people and fleet. In order to complete the task young quarrians are risking their asses all around the area... and sometimes they are risking their asses rather actually! Right, Tali?
Our colonization program of one more world got into serious difficulty when none of three sended earlier scouts has not responded. Now it will be up to you to check out these uncharted areas, to settle a new base and to discover out what has occurred with your predecessors if possible. A lot of experiences, secrets and difficult decisions are included... in addition to hot aliens ofcourse!