Years after the "known" events of the Robin Hood legend, Robin's daughter, Gwyn has grown up to be a strong-willed young woman, with a talent for archery, much like her father. As Maid Marian has died and Robin Hood is perpetually away battling in the Crusades, Gwyn has lived much of her life alone. Her only friend is the sweet but plain Froderick, who clearly is in love with her. Upon the death of King Richard the Lionheart, Robin returns to see that the proper man takes Richard's place as King of England. Robin is quickly foiled and imprisoned by his enemies, the Sheriff of Nottingham and Prince John. It is then up to Gwyn to save the day. She must complete Robin's mission to find and protect the young Prince Philip, who has just returned from exile in France to claim the throne – not an easy task since he has decided to forsake his true identity and is travelling anonymously under his valet's name. Though she does fortuitously cross paths with the prince, she is not aware of his identity. With a romantic spark budding between them, they must find the Merry Men and join forces to free her father from the tortures of the Tower of London before the evil Prince John ascends to the throne and brings England to ruin. After freeing her father, Gwyn along with her father and Prince Philip stop the coronation of Prince John. When Philip is about to be crowned as king, Gwyn with a heavy heart tells him that she can only serve and work for him, and they cannot be together. Robin later explains that he stayed out of Gwyn's life to protect her from the life he leads, but it did not make any difference because she grew up to be just like him. He then proposes a partnership between the two of them to serve Philip, with the only condition being that she take her orders from him alone. She agrees, and at the end they are seen together leading Robin's men, side by side.
Scott Weinberg of eFilmCritic.com gave the film 4 stars, and wrote: ""Princess of Thieves" bucks all the odds by turning out to be an entertaining little movie." Nix of BeyondHollywood.com was unexpected bored by the film despite expecting to like it, she concluded "The movie was made for a targeted audience -- teen girls under 12 -- and everyone else will be bored by it."
