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.

When an in-flight collision incapacitates the pilots of an airplane bound for Los Angeles, stewardess Nancy Pryor is forced to take over the controls. From the ground, her boyfriend Alan Murdock, a retired test pilot, tries to talk her through piloting and landing the 747 aircraft. Worse yet, the anxious passengers — among which are a noisy nun and a cranky man — are aggravating the already tense atmosphere.