Five hostages, three men, two women, were kidnapped in a room for a huge loan shark. The two kidnappers played a game of Russian roulette with the hostages every hour. When the siren blared outside the house, one of the hostages took advantage of the chaos to escape, only to find that there was no one outside. Can a few unlucky guys escape? Is the reason for the kidnapping really just loan sharking? What kind of hidden secret is there behind this?