On a day filled with thunder and lightning, while chatting idly with the team, a flash of lightning is followed by a sudden blackout.

From that moment, your heart begins to pound frantically, and you feel suffocated as if sinking into the deep sea. Physiological tears drop to the floor, and the memories you most wanted to forget fill your mind.

It is a nightmare of those helpless days when you could do nothing as your comrades fell beside you one by one in the pitch-black darkness.

You are seized by the hallucination of being left all alone in that nightmare once again.