A man who gave up on living in despair with society and himself. Mai, a high school girl, is involved in a confinement incident caused by the man. Mai's classmate, Ujiie, who caused a violent incident and lost her whereabouts. Set in a small port town a little far from the city center, a confinement incident triggers the gears of the three characters, depicting the moment when people with difficulties in life take a step forward.

社会と自分に絶望して生きることをあきらめた男。その男が起こした監禁事件に巻き込まれた女子高生・麻衣。暴力事件を起こして居場所を失った麻衣の同級生・氏家。都心から少し離れた小さな港町を舞台に、1つの監禁事件をきっかけに3人の登場人物の歯車が動き出し、生きづらさを抱えた人々が一歩を踏み出す瞬間を描く。