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A teenage girl joins a school for promising killers and trains to become an assassin as she uncovers the mysteries of her parents' death.

After successfully passing the entrance exam to the Playground, Amy must adapt to the school's gruelling training program Young or not so young, no one is exempt. Kill or be killed, it's the only way.

Abducted in the middle of the night by hooded men, Amy will have to remember her training to pass a test with serious consequences.

Amy is sent out in the field for the first time on a very special mission.

Amy tries to find out the truth about her parents' death, no matter the consequences.

While the headmaster is absent, the Playground's students set out on a quest for justice.

Amy and her Playground classmates fight back against ruthless mercenaries.

Back in the Playground, the Father decides to go rescue Hannah, and asks Amy to lend a hand.

With the situation back to normal, the students anxiously await the end of their training.

For the Playground and its inhabitants, it's time to settle scores.