The Eiko-maru was sailing around Odo Island only for it to mysteriously sink. Another ship, the Bingo-maru, was sent to investigate but it too met the same fate with only a scant few survivors. A fishing boat is also destroyed shortly thereafter with only a single person surviving. Compounding matters is when the locals fail to catch any fish during their latest expeditions. An elder residing on Odo Island blames a sea creature that had supposedly terrorized the oceans for generations. That creature is known only as Godzilla.
It is the middle of the sixteenth century in Japan, and a horde of bandits have descended from the mountains. Though they contemplate raiding the village, the chief decides to wait until after their harvest because they had attacked it recently. A farmer overhears the message and the villagers ask Gisaku, the village elder, what they should do. He tells them of a village that once hired samurai. As this village has since remained untouched by the bandits, he declares that they should follow their example. Due to the bandits’ merciless attacks, the village is on the brink of starvation, and they are out of options. With nothing substantial to offer, they will need to find samurai willing to work for a paltry reward.
After a brief period of fruitless searching, the group happens upon a wandering rōnin named Kambei. He immediately demonstrates his skill when he rescues a young boy who had been taken hostage by a thief. A young samurai by the name of Katsushirō then asks to become Kambei’s disciple while the villagers ask for his assistance. Though reluctant at first, he eventually agrees. Kambei then enlists the help of Shichirōji, an old friend of his whom he believed to be dead. From there, they recruit three more samurai, including the wily Gorobei, the rough, yet good-natured Heihachi, and the silent Kyūzō. They eventually welcome Katsushirō himself into the group despite his inexperience because time is of the essence. Shortly thereafter, a drunken man who fancies himself a samurai and claims to be named Kikuchiyo asks to be in the group. The six reluctantly accept him, and they march back to the village. Outnumbered, these seven samurai will need to do everything they can to ensure the farmers’ survival.