In the horror atmosphere, this movie depicts the adventure of a group of teenagers, who decide to go trip to the lake for relaxing, but they ignore the owner of the gas station warnings and continue their way to their destination to find there alien creatures, who throw strange things that suck the blood from their victims, so they run away and ask the people to help them.
The movie has an original premise, some awesomely gory effects, and just the right amount of tongue-in-cheek humor. Those things make it one of the most interesting early-'80s creature features.
[Blu-ray Review] Looking great and jam-packed with quality bonus content, the Blu-ray of "Without Warning" is something of a dream. Highly recommended.