In the early hours of April 13th, a five year old hemophiliac child was kidnapped by someone from Tanemura General Hospital in Tokyo, Setagaya. Tokyo Metropolitan Police Department Inspector Kitahara, who received the report, goes quickly to the Tanemura home, along with other police to speak to the family of the child. Then, suddenly, the phone rings. The kidnapper wants money.
The Japanese karate master Muhashi spent some time in Hong Kong studying various Shaolin martial arts styles. Soon the narcotics brigade calls in his help to combat a powerful drug and prostitution syndicate.
U.S. Army Captain Clark Allen gains attention by walking back and forth, the length of Japan, gambling with U.S. servicemen in order to raise funds to rebuild an orphanage. Suspicious of Allen's motives, a Japanese newsman, Hiroshi Kitabayashi, traces the American's background until he discovers the motive behind Allen's long walk.
