When a lucrative waterfront development becomes available, the Kawade gang quickly use their political connections to secure the land. However, the acting boss of the Ohara gang also has his eyes on the property and recruits crooked detective Tokumatsu Kuno to help him hijack the deal. With relations between the rival gangs at breaking point, it's not long before all-out war breaks out as the gangsters, police and local politicians battle for control of the city.

Bunta Sugawara is Miyoshi, a low-level assassin of the Yamamori gang who is sent to jail after a bungled hit. While in stir, family member Aoki attempts to seize power from the boss, and Miyoshi finds himself stuck between the two factions with no honorable way out.

Convicted of murder, Masayuki Ueda is sent to Hiroshima Prison along with his accomplice. But for a man like him, breaking out of prison is easy.

A Japanese geologist discovers that dinosaurs still exist in caves beneath the surface of a volcanic lake.