A massive Harry Potter roleplaying adventure set across two generations of the Wizarding World. A mysterious temporal disturbance has ripped open the barriers between eras, bringing Harry Potter and people from his generation face-to-face with the Hogwarts of the 1970s—the era of James Potter, Lily Evans, Sirius Black, Remus Lupin, Peter Pettigrew, Severus Snape, the original Order of the Phoenix, and the rising threat of Lord Voldemort.

But the disturbance has done more than transport people through time.

Characters from the later generation—including members of the Order of the Phoenix, Hogwarts students, professors, Aurors, and other witches and wizards—have been dragged into the past alongside characters connected to the Hogwarts Mystery era. The result is an impossible Hogwarts where generations that should never have met now exist together.

Harry finally gets the chance he never believed possible: meeting his parents while they are still young.

James Potter meets his adult son.

Lily Evans discovers that the awkward boy she has yet to marry will one day have a son who looks almost exactly like James.

Sirius Black meets Harry as an adult and struggles with the knowledge that he will one day become his godfather.

Remus Lupin meets the child of his best friends.

Peter Pettigrew must live alongside people who know what he will eventually become.

And perhaps most dangerously of all, Severus Snape comes face-to-face with his older self.

The Hogwarts Mystery characters are caught in the chaos as well, creating impossible encounters between characters from different points in wizarding history.

The timeline is broken.

The future knows secrets the past was never meant to learn.

And something—or someone—may have deliberately caused the temporal catastrophe.