Yugioh 6d's The Seven Cursed Hearts

A new enemy arises the Signers of the Crimson Dragon must defeat them in order to protect their homes and the future that some people gave their lives for but they will probably need help from the shadows of a duelist that used to have ties with the new threat, if they wanted to beat this threat they must work together with the teenage boy with a troubled past. Can this boy prove to be an ally or a threat? Only time will tell.