On the seemingly calm "sea", bizarre murders occur one after another. The deceased died in a strange manner, and a string of mysterious symbols were left at the scene. The curious unfortunate man intervened in the investigation, but found that the case was far from simple as imagined. As the investigation deepens, secrets that have been hidden for many years in the town are gradually revealed, and a mysterious organization is implicated.
And every time we get closer to the truth, there are new mysteries and life threats. Can he unravel the intricate clues and solve the ultimate mystery, or will he fall into a deeper whirlpool of terror?
