Sahasa Veerudu Sagara Kanya is the story of a valiant, adventure-loving young man Ravi (Venkatesh) who finds a Mermaid (Shilpa Shetty) who stays in a sunken treasure ship. She stays with him and falls in love with him keeping her identity a secret. Meanwhile, a ruthless treasure hunter and a cunning witch starts hunting for the Mermaid to get to the sunken treasure. A fairy tale adventure follows.