Nestled among a forest with a secured gate, Grace Field House is home to orphans who lead a joyful life, seemingly as one large family under the care of their “Mama,” Isabella. The children enjoy considerable freedom, spending their days playing outside, although they must adhere strictly to the rule of not straying too far from the home. Additionally, they are subjected to daily tests. While life at the orphanage is pleasant, there is a disturbing pattern: every few months, one child is adopted, leaves for a new family, and is never heard from again.
The oldest three siblings at the orphanage start to question the true nature of their existence there. They soon uncover the grim reality of their situation and the sinister truth about Isabella, the woman they thought was their protector.
[Adapted from MAL]