In a distant galaxy, those in possession of the elegant combat machines known as Mortar Headds hold great prestige and power. That is, assuming they also own a Fatima, genetically engineered women who are required for Mortar Headds to operate at full capacity. A young man named Ladios Sopp arrives on one of the five stars that make up the Joker system to look for a particular Fatima: Lachesis, who he promised to make his bride.