Romaine, Ty and Naomi are The Unthinkables, a team of young super heroes who eventually come together, to protect the city that they love from great evil. The Unthinkables turned into 'Powered Humans' due to 'The Accident'. It is not clear on what caused it, but they are not the only people who have gained such power. They realise that they are not the only ones after encountering a evil Powered Human.