When a sudden tornado engulfs the TARDIS, the Thirteenth Doctor and her fam find themselves transported to the magical land of Oz. With a damaged TARDIS and an unexpected stowaway from the 1930s, their only hope of getting home is to follow the yellow brick road.

But when an army of scarecrows ambushes them, they quickly realise that everything is not as it should be, and they're thrown into a fight for survival against a mysterious enemy. As each of her companions becomes a shadow of their former selves, only the Doctor is left standing.

Desperate to save her friends, she must embark on a perilous journey to seek help from the mysterious Wizard of Oz - and stop whatever forces are at work before she and her friends are trapped in the fictional world forever.