The Jashinka Empire rises from the depths of the Earth to conquer the world. To stop them, Dr. Kyutaro Yumeno assembles five inventors to his laboratory, Yumeno Invention Laboratory and gives them the power to become Dynamen. Each member has their own goal, but as the Kagaku Sentai Dynaman, they are united to stop the Jashinka Empire in their tracks.
The Dynaman must prevent a powerful new gun invented by a friend of Doctor Yumeno from falling into the hands of the Jashinka.
Based on the "2.26 Incident", an attempted coup d'état in Japan 1936, launched by radical ultra-nationalist parts of the military. Several leading politicians were killed and the center of Tokyo was briefly held by the insurgents before the coup was suppressed.
