Emi, a young girl with a stomach upset, enters the magical, microscopic world inside a zebrafish and aids the defenders of her cells to outwit the invading Shigella bacteria. At a time when there is increased anxiety around the viral attack on our cells by Coronavirus, this enchanting fairytale film decodes and celebrates the research happening in The Mostowy Lab at the London School of Hygiene & Tropical Medicine. In an accessible and engaging way it aims to convey cutting edge research about how our cells defeat invading pathogens, and how these scientific discoveries can improve wellbeing and save lives around the world.