Five vacationers and two crewmen become stranded on a tropical island near the equator. The island has little edible food for them to use as they try to live in a fungus covered hulk while repairing Kessei's yacht. Eventually they struggle over the food rations which were left behind by the former crew. Soon they discover something unfriendly there...
Akira Kubo
Kenji Murai - Professor
Kumi Mizuno
Mami Sekiguchi - Singer
Hiroshi Koizumi
Naoyuki Sakuta - Skipper
Kenji Sahara
Senzô Koyama - Sailor
Hiroshi Tachikawa
Etsurô Yoshida - Writer
Yoshio Tsuchiya
Masafumi Kasai - Owner
Miki Yashiro
Akiko Sôma - Student
Takuzō Kumagai
Doctor (as Jirô Kumagai) (uncredited)
