When flesh-eating piranhas are accidently released into a summer resort’s rivers, the guests become their next meal.

Artist Steve Rogers is nearly murdered by spies, seeking his late father’s national secrets. He is saved during surgery via a secret formula; this serum not only heals him but also gives him fantastic strength and lightning reflexes. To help solve the mystery behind his father’s murder and bring those guilty to justice, a government agency equips him with a special motorcycle loaded with gadgets and an indestructible shield. Now armed, he battles against the nation’s enemies as the Sentinel of Liberty, Captain America.

A tomboyish postulant at an Austrian abbey becomes a governess in the home of a widowed naval captain with seven children, and brings a new love of life and music into the home.

David, a college student, is looking for a job. He is hired by Dr. Stoner as a lab assistant for his research and experiments on snakes. David also begins to fall for Stoner’s young daughter, Kristina. However, the good doctor has secretly brewed up a serum that can transform any man into a King Cobra snake-and he plans to use it on David.