Chaika - The Coffin Princess

Season 1, Episode 7: The Valley of No Return

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Continuing their journey to gather the emperor's remains, Chaika and company search for the next of the eight heroes, the wizard Simon Scania. Their search brings them to the town of Rademio, where Simon was last seen four years ago. The people of the town tell them about a "Valley of No Return" filled with thick fog, from which no visitors ever return.