The Sea-demon

I am an ordinary reasoning enthusiast. I was invited by the owner of Octopus Island to form a detective team with four others to challenge the unsolved siren case six years ago. We need to complete the survey within twenty-four hours and submit an answer each. Unexpectedly, the development of the matter was extraordinary, and the case became more complicated and confusing. After the baptism of the seven answers, can the truth surface? This is a text adventure game, mainly based on the plot, including a small amount of gameplay. Players need to assist the detective team to conduct investigations and collect evidence on the island, and then choose the appropriate evidence when the detectives reason. Of course, the most important thing is... to live!