[From here]

'Don't look back.'

Seishin froze as the door locked behind them, but the whispered warning (or was it a threat?) was unmistakable. He managed to prevent himself from looking over his shoulder to see where it came from - what would happen if he did?

He inhaled, and forced himself to calm down, focusing on the sight before them. Rough, stone walls made up a narrow, winding hallway. Occult symbols carved and drawn in what he could only assume to be blood marked the surface, along with bloodied hand prints and pentagrams and writing in a language he didn't recognize. It was unsettling, all of it, and it did not bode well for whatever that awaited them beyond this ominous corridor. It matched the beach they had just left behind rather well...

Nonetheless, they had little choice but to continue...hadn't they? The door had locked behind them, after all. He offered Silvestri-san a glance that conveyed his wariness, but he otherwise did not speak.