An experiment called project 00 was conduct with fifteen orphan children without the public knowing of this fact, it was hidden in the public and also the government.
It was held under an abonded island that was forgetten in the world map. Because the the toxic chemicals mixed in the sea surrounding the whole island itself.
Seven escaped
Two chose to stay behind
And six of them died.
After the escape of the seven children, the project was said to be unsuccessful and was cancelled.
The seven escapees have a plan on taking revenge by destroying and killing all the scientist and all those who is responsible for this.
Because if it isn't because of them, they will have a rather normal life and the six who died will be avenged.