Lost on Paradise Island (1975)

Jimmy War Eagle is a basketball superstar flying disaster relief money to flood victims in Central America when his plane crashes in a storm. he buries the cash, and is eventually rescued by people from a mysterious village on an island called Paradise Island, which seems to float in the middle of a lake (in actuality, a real town pictured now and then in publications like National Geographic). He is befriended by a Priest and falls in love with the beautiful Maria, but local layabouts Mano and Koki hear about the treasure. They steal the sheriff's gun, kidnap Maria and try to steal it.