After the World War, Leicht — branded a war criminal — spends her days carrying out missions to eliminate the many abandoned bioweapons known as “Tekkai” (Iron Puppets). Through it all, she harbors quiet feelings for Esus, her superior officer and the one who once saved her life.
But one day, during a routine operation, Esus vanishes into a snowstorm while pursuing a mysterious man. Did Esus betray her? What did he truly mean to her?
Torn between doubt, pain, and a longing for the truth, Leicht steps into the blizzard herself — to chase after the shadow of the one who changed her life.