Solving the Case is Slightly Bitter, My Sister is Super Sweet.

Summary

A Special Serious Crimes Investigation Team member reports a bizarre case involving a person missing for eight years who claims to have been imprisoned in a hidden, terrifying prison within the Dragon Kingdom. The prisoner describes horrific conditions including high death rates, ruthless guards, and a special corpse pool that can melt flesh and corrode bones. Lin Xuan and his team are tasked with investigating this seemingly unbelievable report, with initial skepticism about the prison's existence.

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