In a world where the government keeps the existence of tamers called *Monto* a secret, Estelle tries to overcome her everyday life as the zodiac sign Cancer. As a member of the organisation *Elements for Justice*, she helps to get rid of political opponents and enemies. When Estelle loses her best friend on a mission, she realises that she must act for her own convictions and flees. In her search for answers and allies, she meets other Monto who don't trust her and show her that everything she knew was wrong. But the government is hot on her heels and a battle for the freedom of the Monto and their existence begins. Will Estelle manage to put her past behind her and use her new abilities to create a better future for all Monto? Will Estelle find the courage and strength to fight against oppression and lies? Can she master her elements and fulfil her destiny as a Monto without being controlled by the government? A gripping battle for freedom and self-determination begins.