Inside a dark and cold room, five children sat on the floor waiting to be let out as the scientists instructed them to wait. An alarm blared, and the children dashed to the door and began to bang on its metal surface, screaming to be let out.

The door opened, but on the other side was a strange humanoid creature made of a black liquid, with a featureless face, and glowing red eyes with vertical slit pupils. He offered to take them with him and help them escape, as long as they pledged to serve him.

Two of the five children agreed and left with this creature. The other three managed to get out without hurting anyone, but the two and the creature left nothing but chaos and death in their wake.

Three have turned to good, and three have turned to bad. Blitz, Rewind, and Nightfall are ready to defend their city with their lives, but Seven, CB, and Crow are ready to destroy it to get what they want.

The stakes are high for both sides and the risks are even greater, can good overcome the evil within? Find out, in this book: Once Brothers. .