Mystery Mine

Ruipu Mine was rich with natural gold. One day a massive blast echoed from deep within the mine, and the tunnels collapsed — the workers inside never emerged. This didn’t seem like an ordinary explosion, so the local government assembled an investigation team to get to the bottom of it. One hour later another tremendous blast shook the mine, and the investigation team vanished. From then on, the mine gave off a blast every hour. With no other options, the government hired the Black-Clad Detective Corps to investigate. But the deeper the detectives dug, the more they realized this was far from a simple accident...