One-Day ruler
Synopsis
A naive villager enters the city and, due to his strong resemblance to the city's ruler, is mistaken for him. Since the ruler got lost during a hunt, the villager governs as the ruler for a day or two. But eventually, the real ruler is found, and the villager goes back to his own work.
You might also like

In a seemingly perfect community, without war, pain, suffering, differences or choice, a young boy is chosen to learn from an elderly man about the true pain and pleasure of the "real" world.
The Giver

A childless couple bury a box in their backyard, containing all of their wishes for an infant. Soon, a child is born, though Timothy Green is not all that he appears.
The Odd Life of Timothy Green

As a top student at St. Adeline's Catholic Boarding School, Zoe senses that something is not quite right about the school's new nun-- a sense proven to be true when it is revealed the "good' nun is an imposter with a fatal attraction to Zoe's brother.
Bad Sister

In a dystopian future, insurance fraud investigator William Gold arrives in Shanghai to investigate a forgery ring for "papelles", futuristic passports that record people's identities and genetics. Gold falls for Maria Gonzalez, the woman in charge of the forgeries. After a passionate affair, Gold returns home, having named a coworker as the culprit. But when one of Gonzalez's customers is found dead, Gold is sent back to Shanghai to complete the investigation.
Code 46

Waking up in an unfamiliar city, a man with no memory must confront the mysteries of his own identity. However, his desperate search to uncover the past pits him against a powerful enemy, leading to a showdown that ultimately reveals the truth.
Man with No Past

In an alternate universe where twinned worlds have opposite gravities, a young man battles interplanetary prejudice and the laws of physics in his quest to reunite with the long-lost girl of his dreams in this visually stunning romantic adventure that poses the question: what if love was stronger than gravity?
Upside Down

A top-secret government weapons designer is arrested by a clandestine government organization on suspicion of being a clone created by the hostile alien race wanting to take over Earth.
Impostor

After a freak accident, an invisible yuppie runs for his life from a treacherous CIA official while trying to cope with his new life.
Memoirs of an Invisible Man

A chilling vision of the House of Saddam Hussein comes to life through the eyes of the man who was forced to become the double of Hussein's sadistic son.
The Devil's Double

The story of an ancient war that is reignited when a young farmhand unwittingly opens a gateway between our world and a fearsome race of giants. Unleashed on the Earth for the first time in centuries, the giants strive to reclaim the land they once lost, forcing the young man, Jack into the battle of his life to stop them. Fighting for a kingdom, its people, and the love of a brave princess, he comes face to face with the unstoppable warriors he thought only existed in legend–and gets the chance to become a legend himself.
Jack the Giant Slayer

When his mother dies, young Peter Ibbetson leaves Paris and his best friend, Mary, behind to live with a severe uncle in England. Years later, Peter is an architect with little time for women, until he begins a project with the Duke and Duchess of Towers. When Peter and the duchess become great friends, she reveals that she is Mary — but the duke soon suspects his wife of infidelity and challenges Peter to a duel, threatening the pair's second chance.
Peter Ibbetson

An American village is visited by some unknown life form which leaves the women of the village pregnant. Nine months later, the babies are born, and they all look normal, but it doesn't take the "parents" long to realize that the kids are not human or humane.
Village of the Damned

Garfagnana, Italy, 1347. The handsome servant Masseto, fleeing from his vindictive master, takes shelter in a nunnery where three young nuns, Sister Alessandra, Sister Ginevra and Sister Fernanda, try unsuccessfully to find out what their purpose in life is, a conundrum that each of them faces in different ways.
The Little Hours

A pregnant New York social worker begins to develop romantic feelings for her gay best friend, and decides she'd rather raise her child with him, much to the dismay of her overbearing boyfriend.
The Object of My Affection

16-year old Rhiannon falls in love with a mysterious spirit named “A” that inhabits a different body every day. Feeling an unmatched connection, Rhiannon and “A” work each day to find each other, not knowing what the next day will bring.
Every Day

A kingdom's ascending heir, marked for assassination, switches identities with a lookalike, who takes his place at the coronation. When the real king is kidnapped, his followers try to find him, while the stand-in falls in love with the king's intended bride, the beautiful Princess Flavia.
The Prisoner of Zenda

Quentin Jacobsen has spent a lifetime loving the magnificently adventurous Margo Roth Spiegelman from afar. So when she cracks open a window and climbs back into his life dressed like a ninja and summoning him for an ingenious campaign of revenge, he follows. After their all-nighter ends and a new day breaks, Quentin arrives at school to discover that Margo, always an enigma, has now become a mystery. But Quentin soon learns that there are clues, and they're for him. Urged down a disconnected path, the closer Quentin gets, the less he sees of the girl he thought he knew.
Paper Towns

When a couple decides to adopt a stray cat their perspective on life changes radically, literally altering the course of time and space and testing their faith in each other and themselves.
The Future

Sam Flynn, the tech-savvy and daring son of Kevin Flynn, investigates his father's disappearance and is pulled into The Grid. With the help of a mysterious program named Quorra, Sam quests to stop evil dictator Clu from crossing into the real world.
TRON: Legacy

Two boys – the prince Edward and the pauper Tom – are born on the same day. Years later, when young teenage Tom sneaks into the palace garden, he meets the prince. They change clothes with one another before the guards discover them and throw out the prince thinking he's the urchin. No one believes them when they try to tell the truth about which is which. Soon after, the old king dies and the prince will inherit the throne.