When Roya inherits her estranged father's villa after his death, her exploration of the property leads her to a hidden basement tunnel that ends in a secret study room. Among the dozens of papers and books scattered around the small room, she finds her father's hand-written journal in which he documents his studies of a distant realm. Giving in to her curiosity and desperate desire to connect with the parent she never knew, Roya chooses to abide by her father's written rules and discover the subject of his studies. But when a stranger breaks into her new house and she overhears her mother promise the police officers her best to find "the hidden stash", Roya begins to think that perhaps her father's documented realm is not so secret after all; and that perhaps his death wasn't an accident, either.