Onleaveinashoresidetown,Johnnybecomesinterestedinayoungdarkhairedwoman.Theymeetandhelearnsthatsheplaysamermaidinthelocalcarnival.Afterstrangeoccurrences,Johnnybeginstobelievethatshemayactuallybearealmermaidthathabituallykillsduringthecycleofthefullmooneee