Puerto Rico provides the backdrop for 'Undercurrent' - a story of Suspense, Passion and Murder. When wrongly convicted ex-cop Mike Aguayo arrives in the South American Island paradise to manage a nightclub with his ex-partner Eddie, he quickly becomes embroiled in Puerto Rico's seedy underworld. Mike is introduced to the ruthless Carlos Rivera JR who puts an indecent proposal towards him, asking him to sleep with his beautiful wife Renee in exchange for $200,000 - an offer Mike refuses but soon discovers that by doing so he is putting Eddie's life in danger. Mike grudgingly accepts but soon reneges on the ignoble pack after become emotionally attached to the beautiful Renee. Mike however soon uncovers a sinister plot to frame him and has to do battle with Carlos for his life.