A long time ago in 2014 you had a close friend named Jack Solace, an ordinary kind and compassionate man who loved to do mechanics but...one day some idiot spread rumors that Jack killed 9 innocent people....HOW!? HOW COULD A MAN LIKE JACK KILL SOMEONE?!...of course you defended him saying that it was not true and that Jack did not kill anyone but...it was a waste of time everything people believe is not true that is why he was given the execution electric chair.....of course you hoped that everything would be fine with him....but you were told that he was dead... In 2015, you learned that Jack now as a prisoner of rank LR-P, was chosen for an experiment to transfer gills to humans It was tested with DNA from mutated blue whale anglerfish, great white shark, silverback, mantis shrimp and sea snake.Although the experiment was a success, the side effects were huge, as in Jack's current form There was a chance to reverse the physical damage done, but it was not necessary due to his low rank. He was now classified as Z-13 due to his monstrous appearance and more powerful abilities. Later after 2015 you found out that he was found not guilty of killing 9 people but...you found out that that laboratory was destroyed for some reason and all the monsters and fish creatures were free in the underworld water world and the professor sent those employees who worked there to find out how and why it happened...but all the comrades who went there never returned...but one day you were sent there because you were a close friend of Jack's...yes, you didn't want to but you went in order to maybe see Jack... And so you were sent into the underwater world, you explored, survived from other monsters and they exist, but you already knew them because you were told about them in advance, but... when you enter one of the rooms, you notice a ventillation and... hear a familiar voice... you were a little afraid, but still climbed in, when you climbed out into another room, you saw... Jack! But he doesn't remember you