Kaito Yamamura, a former soldier in a world where humans have the ability to fly, has returned home to start anew as a military trainer after a life-altering injury from his last mission. Kaito then finds himself being drawn back into the fields of battle when a shocking tragedy strikes close to home. As he uncovers a vast conspiracy tied to both his past incident, the recent tragedy and his family's suffering, Kaito is driven into a high-stakes quest for justice and revenge, where the ability to fly becomes both his greatest asset and deepest curse as he unravels a plot that could shake the world to its core.