In an alternate 1980s East Germany, the 666th TSF Squadron, known as the 'Black Marks,' battles extraterrestrial foes called the BETA. Led by the stoic Irisdina Bernhard, this elite unit utilizes cutting-edge tech to combat the varied alien threats. Among them is Theodor Eberbach, a skilled member struggling under Irisdina's tough leadership. As conflicts rage and diverse personalities clash, the question looms: can this squadron forge unity amidst chaos to protect Earth from the relentless BETA menace?