A serious-minded policeman plays the role of robber in a police training operation against bank robberies. He's so good his fellow policemen can't catch him. TV networks begin to broadcast the operation nationwide. TV audiences are amused and root for the runaway robber and police grows desperate to arrest him to save their face. However the robber remains at large.

性格老实正直的巡查平田道夫依照命令在防暴演习中扮演抢劫犯认真过头完全入戏，发展急转直下跌人眼镜，让原本只想做个样子营造警方光辉形象博取民众好感的上级官僚焦头烂额欲哭无泪……

予行練習で銀行強盗役になるよう命じられた警察官・平田。だが、彼は真面目がゆえに本物さながらの演技をし、大騒動へと発展する。