改編自日本暢銷推理小說《瓢蟲》，描述由布萊德彼特領銜主演的殺手「瓢蟲」，在日本高速電鐵的列車上，遇見了許多來自不同背景以及不同類型的殺手，背後彼此有著衝突目的卻又互相連結的出現在同一輛列車，究竟這輛殺手滿座的列車會擦出什麼火花？

(轉載自 - 索尼影業)

Trained killer Ladybug wants to give up the life but is pulled back in by his handler Maria Beetle in order to collect a briefcase on a bullet train heading from Tokyo to Morioka. On board are fellow assasins Kimura, the Prince, Tangerine, and Lemon. Once on board the five assasins discover that their objectives are all connected.