Set in the future on a war-ravaged Earth, four exhausted soldiers man Sentinel - a remote military base in a vast ocean that separates two warring continents. While their tour of duty ended three months ago, the relief crew still hasn't arrived and as the empty weeks turn to months, paranoia descends, testing relationships to breaking point... A platoon of soldiers are stranded in an abandoned military base on a near future Earth waiting for the relief or the enemy, whichever comes first.