Meet George Sam, also known as Uncle Bull, a 70-year-old Medal of Honor veteran who lives life by serving both God and Satan. This philosophy, however, constantly puts him at odds with his devoutly religious wife, Nany, affectionately dubbed "Crazy Nany" for her fiery temper. Despite his age, Uncle Bull is a spry and mischievous figure, always seeking the thrills of love and life, much to Nany's exasperation.
His tranquil retirement takes an unexpected turn when, after years of disappointment, he experiences a miraculous erection—a "90-degree achievement" he credits to a mysterious Mexican woman. Eager to prove his vitality to his mocking wife, he rushes home, only to expose himself (and his "miracle") to Nany and her visiting nuns in a comically disastrous moment. The fleeting miracle vanishes, leaving Uncle Bull to face Nany's wrath, which he anticipates will be far worse than any nightmare.
But the night is just beginning. Under the unexpected influence of the "Devil's Viagra"—a powerful synthetic drug he accidentally consumes—Uncle Bull is transformed into an unstoppable force. He embarks on a series of outlandish adventures: commandeering a wedding carriage, accidentally exposing a corrupt mayor's hidden vices and absurd "Compass of Columbus" conspiracy theory, and unmasking a supposedly holy evangelist as a sinister biological weapons manufacturer using his church as a front. Along the way, he exposes a nun's secret obsession with sex toys and saves a boy from being prematurely buried, earning him a million-dollar reward and even a national hero award.
"The Devil's Viagra" is a riotous, dark comedy that plunges Uncle Bull into a whirlwind of chaos and improbable heroism, proving that even in the most absurd circumstances, a dash of unwitting bravery (and a lot of "Devil's Viagra") can turn an ordinary man into an accidental legend.