What does humanity mean? Was the world always the same? The powers are known as cosmium, what's the source of it? There are tons of questions arousing in a world where people and artificial intelligence are coexisting to fight human needs and issues. At least it seems this way. But what may seem might not be always true. It's the tip of the iceberg. This world has its tale, a dark one. Just to run along the flow, Ayesha and her friends set off to become nightingales, certified heroes who put their lives on the line to make the world a better place. But the corruption, the true reason for everything happening and the motive of higher classes would question everyoneAM I REALLY THE HERO?