We are in 2138, the raw material resources on the Earth have been depleted. With the support of civil society the private companies have colonized the surrounding planets and utilizing their natural sources. Since the mining technology is not achievable for everybody, lots of people are organized in groups and start looting the planets. In response, the Exacorp established Red Siren squad to struggle against raiders. As a young soldier of the Red Siren you have to defend the bases and fight against the raiders who want to win at all costs...