In the reimagined adventure of "Return to Oz", Dorothy Gale finds herself once again whisked away from the sepia tones of Kansas to the vibrant and perilous lands of Oz. This time, however, she's not alone. By her side is her daring and resourceful cousin, Henry "Indiana" Jones, whose thirst for adventure rivals her own.
Dorothy's Aunt Em and Uncle Henry take her to the sanatorium of Dr. Worley, where Indy is studying for the summer. Concerned her continued obsession with the Land of Oz is a sign of delusion, Worley and his assistant, Nurse Wilson, plan to administer electro-shock therapy to Dorothy, before a lightning storm causes a power failure. Dorothy is rescued by a mysterious girl, who tells her Worley's machines damage patients, and the two escape. Nurse Wilson chases the girls into a river, where Indy gets into a fight with her. Indy and Dorothy float away on a chicken coop, unable to save the other girl.
Dorothy and Indy, much to Dorothy's surprise, find they have arrived in a much-changed Oz. They follow a badly-damaged yellow brick road to the Emerald City, which is in ruins, its citizens, including the Tin Man and Cowardly Lion, are turned to stone and a new villain, the Nome King, reigns with an iron fist.
One of the first obstacles they face is the treacherous Deadly Desert that surrounds Oz. The sands of this desert are alive and turn any living creature that touches them into sand. Indy, with his adventurous spirit, ingeniously crafts a pair of makeshift shoes, allowing them to glide over the perilous sands safely. Indy's knowledge of ancient artefacts and history helps them decipher clues and navigate the treacherous landscapes of Oz. Throughout their journey, Dorothy and Indy's relationship grows stronger. They learn from each other, with Dorothy's pure-hearted bravery complementing Indy's adventurous cunning.
As they venture deeper into Oz, they encounter the Wheelers - sinister creatures with wheels instead of hands and feet, who patrol the ruins of the Emerald City. They are saved by a mechanical man, Tik-Tok, who explains he was told by Scarecrow, the king of Oz, to await Dorothy's return. Indy's quick reflexes with his whip together with is brawling skills, and Dorothy's clever thinking help them outmanoeuvre the Wheelers, using Tik-Tok's mechanical strength to their advantage to escape unscathed. As they journey through Oz, Indy's bravado and adventurous spirit push them to take risks and think creatively. Dorothy, inspired by her cousin's fearless nature, finds a new strength within herself.
Their next challenge comes in the form of Mombi, the wicked witch with a collection of interchangeable heads. To retrieve the Powder of Life, essential for their quest, Indy and Dorothy must sneak into Mombi's palace. Indy's knowledge of traps and stealth from his treasure-hunting experience proves vital as they navigate the dark corridors filled with magical alarms and enchanted sentries. Locked in a tower, the group encounter Jack Pumpkinhead, who explains he was brought to life by Mombi's Powder of Life. Dorothy steals the powder from Mombi whilst Indy constructs a flying creature from furniture and the head of the Gump, a moose-like animal, which flies them across the Deadly Desert to the Nome King's mountain, pursued by Mombi and the Wheelers.
The most harrowing challenge awaits them in the underground kingdom of the Nome King, who has transformed the citizens of Oz into ornaments. The Nome King's cavern is a labyrinth of illusions and riddles, and he challenges the group to a dangerous game. Each must choose an ornament that they believe is a transformed citizen. If they guess incorrectly, they too will become part of his collection. Indy's love for puzzles and riddles comes to the forefront as he attempts decipher the Nome King's cryptic clues. However, the Gump, Jack, Tik-Tok and Indy all fail and are turned into ornaments themselves.
Before Dorothy begins her turn the Nome King reveals he has her lost ruby slippers, which he used to conquer Oz, and offers to use them to send her home instead, but Dorothy refuses. With her third and final guess she selects a green gem, which turns into Scarecrow. Realising inhabitants of Oz turn into green objects, Dorothy finds and restores Jack, Tik-Tok and the Gump. Enraged, the Nome King imprisons Mombi as punishment for Dorothy’s escape, then grows to gigantic size. He prepares to eat Jack, before Billina lays an egg that falls into the Nome King's mouth, poisoning him. Dorothy retrieves the ruby slippers and hurriedly puts them on as the subterranean Nome kingdom collapses. She wishes for the group to return to the Emerald City, where she restores Indy from a green medal on Gump's antler.
The people of Oz ask Dorothy to be their Queen, but she desires to return home, while Billina chooses to stay. Princess Ozma - the girl from the sanatorium and rightful ruler of Oz, who was imprisoned in a mirror by Mombi - is then freed and ascends the throne. Dorothy gives Ozma the ruby slippers, which she uses them to send Dorothy and Indy home, promising she can return in the future if she wishes.
Dorothy is found by her family on a riverbank in Kansas, where Aunt Em tells her that the clinic burned down, with everyone except Worley surviving. Nurse Wilson is arrested for her part in Worley’s experiments. Returning home, Dorothy sees Billina and Ozma through her bedroom mirror and calls for Aunt Em, but they signal for her to keep Oz a secret.
The film ends with Dorothy and Indy back in Kansas, but this time she has a treasure trove of memories and the knowledge that she has a cousin who shares her love for the extraordinary. As for Indy, he's off to his next adventure, his appetite for discovery as insatiable as ever. "Return to Oz" with a twist of Indiana Jones is a tale of courage, friendship, and the unbreakable ties of family, set against the backdrop of one of the most magical worlds ever created.