-Yes, the prisoners are probably at the end of one of these tunnels. In the second one, counting from the left, we encountered some toxic waste, which poisoned us badly; in the ninth, we found the owner's private office with a lot of traps; in the seventh, there was a medusa storage. We didn't have time to check the rest.
Added 3 minutes later
Seeing Tiberius, Sarael was convinced that he had done the right thing by deciding to visit the restaurant and go down there.