Cassio went on vacation to Giles Island in Maine, a remote island with few residents, and his arrival was obviously not accepted by the islanders. Except for Nelken, the female biology teacher in primary school, all the others were very exclusive to Cassius. In addition, since Cassius came to the island, people have been dying mysteriously. The sheriff on the island thought it was an accident, but as a surgeon, Cassio found that the bodies of the victims had been bitten by insects, so he and Nell launched an investigation together. And sent the worm to the medical school in the United States to study. Unexpectedly, these appalling cockroaches came from a rare species in Africa as far away. They use the human body as a breeding nest, and they are so destructive that no man or animal can avoid it. Due to the rapid breeding of cockroaches, thousands of cockroaches have invaded Gales Island before long, and the residents are eaten by cockroaches one by one, leaving only Cassius, Nell and other people. they had a big showdown with the horrible man-eating cockroaches!