Firefly Era

In order to protect the non-renewable resources on the earth, inexhaustible solar energy has been widely used in various fields. The sudden disappearance of sunlight has plunged mankind into panic, because they have to face not only endless darkness and the paralysis of various equipment, but more seriously, the withering of a large number of plants will cause the food chain to break, which will bring about a catastrophe: famine! How can humans with advanced technology sit still and wait for death? So a project called "Firefly" was launched. As one of the volunteers, Bai Hao was transported to a feudal era to collect solar energy. What fate awaits him?