At that time, the whole world was in a state of localized hot wars, mostly during the Cold War period.
A country's scientists discovered a toxic mimic "plant" resembling an orchid in deeper sea areas and used it to experiment and develop biochemical weapons.
The story takes place on an island that was a popular tourist destination in earlier years, where researchers had long been stationed and bribed the government to prepare for large-scale biochemical experiments. After the experiments began, the entire island was cut off from communication with the outside world, and the sea was blocked, with a large number of gas bombs made from the toxic substance being dropped from the air...
The protagonist is an "antidote" created by a "mysterious doctor," who awakens three years after this experiment.

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