L0SGT----full name is level 0 species photographic team, zero-level species photographic team, affiliated to the National Geographic Society. This is a mysterious and small photography team whose mission is to search for and record with cameras those critically endangered species distributed around the world. From plants to animals, from fungi to insects, they are isolated from the world and live in primitive areas that are not known to anyone. Some even only appear in myths and legends. Sanji and Ace are the two core members of this group, and a series of dangerous explorations followed...
Mysterious rule: Please close your eyes when it gets dark - why Sanji's camera can't take pictures of dead things.
Sauron, a young swordsman he meets while exploring the Mariana Trench, what kind of entanglements will arise between them.
The giant dragon king squid, the tiger-mouthed crocodile, the silver-crowned snowtail sparrow, the feathered tiger, the shark, the red-flamed blood-necked flower... These zero-level species overlook the common people in their world. In order to find out their true appearance, Sanji and Ace traveled through the barren mountains and rivers, using their lives as a bargaining chip, to make a trivial struggle against nature. In the end, who is the final winner...