Prima Aprilis was released in the year 1988。Prima Aprilis is also called as April Fool's Day (1986/I), Week-end de terreur, Jolly Killer, Horror-Party, Eglima tin protaprilia, Aprillipäivä, A Noite das Brincadeiras Mortais。

A group of eight college friends gather together at an island mansion belonging to heiress Muffy St. John to celebrate their final year of school. They soon discover that each has a hidden secret from their past which is revealed, and soon after, they turn up dead. Yet, are they really dead? Or is it just part of some very real and cruel April Fool's jokes? The hostess, Muffy, is the only one who apparently knows what's going on. But then again, is it really her doing the killing?

Prima Aprilis actors and actresses include Thomas F. Wilson。