Judging by their behaviour, the last thing you would say about Emma and Chantal is that they share the kind of soul connection typical of twins. The two teenage girls are different in almost every sense, from their personalities to their style to their plans for the future. Emma is a retro girl—fascinated by goth fashion, she dreams of taking her first steps into the world of music. Self-confident blonde beauty Chantal has established herself as a fashion blogger and has serious plans for a future in the industry. When their parents decide to take a long trip abroad, the two girls are given the responsibility to take care of the home, as well as each other. It’s a chance for them to work through their relationship as siblings, which have been in a state of guerrilla warfare. The handsome boy who moves in next door doesn’t make things any easier. Metal Heart is the directorial debut of popular Irish actor Hugh O'Conor. He has created a funny, colourful, often surprising story of girls growing up, competing with each other and trying to find their own path in life.