A couple on the verge of a nasty divorce attempt to sell their empty love nest and move on with their lives, separately. After a successful open house they are horrified to discover, days later, that a potential buyer didn't leave their home. While Alice is being held captive in the basement, the unannounced house guest moves in upstairs. She senses her capture is being kept a rebellious secret. She knows her way only way out if she can only get out alive.

　　赤松德郎是個(gè)腳踏實(shí)地的小型運(yùn)輸公司老板，一直努力維持公司，然而某天他公司的貨車(chē)發(fā)生輪胎飛脫導(dǎo)致年輕母親死亡的事件，在警方和媒體都認(rèn)為他是殺人兇手之時(shí)，赤松查出全國(guó)都出現(xiàn)類(lèi)似的事故，全部都涉及大型汽車(chē)制造商「希望汽車(chē)公司」的汽車(chē)，于是赤松為了證明自己無(wú)罪討回公道，只身挑戰(zhàn)龐大企業(yè)。