Funny, moving, and deeply human, I Swear tells the remarkable true story of John Davidson, a Tourette Syndrome campaigner whose humour and honesty helped the world better understand the disorder.

Robert Aramayo (The Lord of the Rings: The Rings of Power) plays Davidson, whose life was irrevocably changed at 15 years old when he developed uncontrollable vocal and physical tics. Tourette Syndrome was barely understood at the time - even by doctors - causing John years of isolation, anxiety and shame.

It wasn’t until Davidson reached his late twenties that things started to change. After meeting Dottie, the mother of a former school friend, who had recently been diagnosed with terminal cancer, a strong bond formed between the pair. With Dottie’s unwavering support, John discovered the confidence to be himself.