Liu Jue was accidentally bound to the life exchange system because he complained about his nephew Qi Guangling's naughty nature. Qi Guangling, a science genius, was sent to ancient times when food and clothing were scarce. He relied on modern science knowledge to make carbon to survive, develop explosives to build weapons, and smelt steel to strengthen his strength. Qi Guangrui, a sickly young man who looked exactly like him, came to modern times. Under the care of his cheerful aunt Liu Jue, he cured his heart disease through surgery, received guidance from famous teachers, and financial support to start a company. The two young men in ancient and modern times each grew and transformed in a strange time and space, and finally worked together to help stabilize the ancient mountains and rivers and achieve unification of the world.
