Ground Lock

A sudden earthquake traps a young lawyer underground. When he woke up, he found that he had temporarily lost his memory due to a concussion, his legs and feet were pinned down by a water pipe and he could not move. He was trapped in a closed space that was half filled with water. He was suffering from the horrific ending of a painful and lonely death in a harsh situation where he was unable to contact the outside world. Just as the fragmented memories that kept flashing back continued to torture him, a strange sound suddenly came from behind the wall next door... How should he use the limited resources at hand, remaining sanity, and simple knowledge of nature and physics to overcome the broken memories that keep flashing back in his mind while trying to find a way to escape? As time passes, the lost memories come to mind little by little, and unexpected surprises unfold. What kind of past does the young lawyer have? Can he successfully escape from the underground? Let's wait and see.