Struggling to save their marriage, a couple embarks on a perilous hike through the Colombia rainforest. But when they become trapped in quicksand, they must work together to survive against the unforgiving jungle elements and escape their precarious situation. With their relationship put to the test, will they be able to overcome their troubles and emerge stronger on the other side?

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Some movies that have similar genres and were produced around the same time as Arenas Mortales include Orphan: First Kill, A Haunting in Venice, Into the Deep, Tethered, Soft & Quiet, Haunting of the Queen Mary.