It starts as the fantasy every kid has once, lock the door, declare a liberation zone, make the adults negotiate, and then it quietly hands you the bill. Mamoru is a history nerd who only barricades himself in that abandoned wartime facility because Aya is moving away and he cannot say the one sentence that matters. The siege runs on stolen wifi and bravado, the hacker kid broadcasting the standoff so the outside world has to watch, and the whole game turns serious the moment Malika's deportation stops being an abstraction and becomes the actual reason to hold the line. The satire lands because the grown-ups are not cartoon villains, they are people with careers and campaign optics to protect. Seven days of noise, and what sticks is a boy finally being honest before the summer ends.

On the day before summer vacation, Mamoru Suzuhara, a withdrawn student who reads about modern warfare in his spare time, learns that his neighbor and longtime crush Aya Chiyono is about to move away with her family. He finds the nerve to suggest they run away together for a week, and several classmates join them in hiding at an abandoned coal factory. The hideout soon proves less empty than they thought, and they end up sheltering Mallet, a Thai resident without legal status who is evading immigration officers while searching for his parents. When officers and parents come to haul them back, their small act of rebellion grows into an all-out war against the adults. Adapted from a novel by Souda Osamu, the film blends action, comedy, drama and thriller with a coming-of-age story about teenagers struggling to voice their feelings and defend what matters to them.