A fairy tale about love, envy, and intrigue, which are deservedly rewarded by the powerful ruler of the river. The magical ring of the powerful king of the river frees the fisherman's daughter from evil power, but she must never take it off. A wealthy merchant indulges the whims of his beloved wife, who is encouraged by her maid to seek more. She hopes that the merchant will soon lose patience, reject his wife, and that she will take her place. Together, they persuade him to obtain the ring at any cost. However, the river king's gift has more power than they realize...