A playboy who flies around with LED lights on his chest and an iron shell, a nerdy four-eyed man who swings between skyscrapers in a masked bodysuit, a doctor who turned into a lizard and lost his arm trying to find his little right arm, an expired chilled fresh who has been lying in the Arctic for seventy years but still has a fit body, a bald doctor who pretends to be an octopus with four mechanical tentacles on his back, a veteran thief who can freely change his body size... From some point on, in the world where Kraft lives, there appeared a large number of special groups who use science to become unscientific. The great writer Lu Xun once said: "The only thing that can defeat science is science." Therefore, Kraft Lee decided to devote himself to the cause of scientific research.