Abby Arcane, a doctor of the Centers for Disease Control and Prevention, went to a swamp in his hometown to investigate a deadly infectious disease virus, but found something mysterious and terrible in the swamp. ⋯⋯Arcane is a smart and caring woman. The encounter with the scientist Alec Holland let her know the new world full of terror and supernatural forces, as well as the powerful and terrible creature "swamp monster". And Holland's research on the swamp made him discover some secrets, which led to the dark forces, and he became a powerful hero swamp monster. The monster is trying his best to maintain the remaining human nature, and he must adapt to his new identity as soon as possible to guard the town and the natural world outside.