is revealed that a principle known as Croaker's Law restricts all legal Time-Turners to travelling a maximum of five hours into the past (any longer would create ripple effects that would harm either the time traveller or time itself) – although it is widely rumoured that Draco Malfoy's son Scorpius is the son of Lord Voldemort and that Scorpius' mother used a Time-Turner to make this possible. An illegal Time-Turner capable of travelling back years is confiscated from a Dark wizard by the Ministry of Magic (although official word remains that all Time-Turners are destroyed) and is later stolen by Albus Potter and Scorpius Malfoy, who intend to travel back in time to prevent the death of Cedric Diggory. Unfortunately, they quickly discover the Time-Turner is a cheaply made prototype that only takes them back for five minutes before forcibly returning them to the present. After accidentally creating (and then undoing) an alternate reality where Voldemort survived and took over the world, Albus and Scorpius resolve to destroy the Time-Turner, but are forced into another time trip by the story's villain and are left trapped in the past when the Time-Turner is destroyed. Back in the present, Draco reveals he possesses a professionally made Time-Turner (bound by neither Croaker's Law nor the five-minute flaw) - he never admitted its existence for fear it would lend credence to the rumours surrounding his son and never used it (despite being tempted by the possibility of seeing his dead wife alive again). When Albus and Scorpius are able to send a message to their parents, Draco's Time-Turner is used to rescue the boys. Vanishing Cabinet The Vanishing Cabinet is a cabinet located in the Room of Requirement at Hogwarts. It is one of a pair. The other cabinet resides in Borgin & Burkes. If used properly, a person who steps into one of the cabinets will instantly emerge from the other. The Vanishing Cabinet is first seen in Chamber of Secrets when Harry hides in it to elude the Malfoys after accidentally travelling to Borgin & Burkes via the Floo Network; its transportation features are not activated as he does not shut the Cabinet completely. Its Hogwarts counterpart is also mentioned in Chamber of Secrets when Nearly Headless Nick persuades Peeves the Poltergeist to drop it (thus breaking it) over Filch's office in order to help Harry escape detention for tracking in mud.