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The “Abyss” is the last unexplored region, an enormous and treacherous cave system filled with ancient relics and strange creatures. Only the bravest of adventurers can traverse its depths, earning them the nickname, “Cave Raiders.” Within the depths of the Abyss, an orphaned girl named Rico stumbles upon a robot who looks like a young boy. Tantalized by the mysteries of the Abyss, Rico and her new friend descend into uncharted territory to unlock its mysteries, but what lies in wait for them in the darkness?
(Source: Sentai Filmworks)