Harry (Daniel Radcliffe) doesn’t get on with his aunt and uncle whatsoever, and when he is pushed over the edge, he decides to use magic on his uncle and inflate him into a balloon. Afraid that he will be penalised and kicked out of school for using magic when he shouldn’t, Harry decides to run away. He soon finds that there are bigger worries for him; although he’s not going to be kicked out of school, there’s a mad-man known as Sirius Black (Gary Oldman) that has escaped from prison and is thought to be on the hunt for Harry to avenge his master; Lord Voldemort.

With Hogwarts and its students in danger, the dreaded prison guards known as ‘Dementors’ are brought in to ensure their safety from the prison escapee. Knowing the horrible effect they have on him, Harry knows he would be best to keep away from them! Harry is in store for his past to be exposed, and he’s about to find out a lot more about his parents and what made him ‘The Boy Who Lived’.