Things have become peaceful, or as close to it as it can get, for Tsuna and his friends. The Arcobaleno's curse had been lifted and the infants are now allowed to continue on with their lives. Where they must grow up again, according to a theory Verde had come up with, they are fine with that. Bermuda and the Vindice watch over the balance of the world with Bermuda taking the Tri-Ni-Set from Kawahira. Vindice is protecting the flames so that no one will have to become Arcobaleno again. For the time being, things seem to have returned to normal. However, how long will that normality last?

A new mafia family is on the rise, gaining power as it goes. It doesn't appear to present itself as a threat toward the Vongola right now, basically going under the radar. However, it is a bit troublesome toward mafia families of what seems to be its own level, passing off as just a mere squabble between smaller families. They call themselves the Cattivo. Any that seem to get in their way usually don't bode well and their numbers are growing. Still, is what appears to be seen really what's being seen or is there something more going on behind the scenes? Are their numbers really what they appear to be or are there more of them?

In the shadow of the Cattivo, it's said another group seems to be forming. It is believed they are going by the name of Volante. A mafia family that was believed to be wiped out due to a tragic incident. It is said that they are being lead by the sole survivor of that tragic incident, seeking revenge on those responsible for the deaths of their friends and family.

Coincidentally, while this is happening, local law enforcements have been patrolling the nearby towns and cities as if on the alert for something. It's getting more difficult to remain hidden from the local authorities day after day. It is rumored that some of the local authorities, themselves, appear suspicious in their activities and it's left for debate whether or not they are acting based on moral purposes or otherwise.

With everything circulating gradually, it's only a matter of time before things start getting out of hand again and more conflicts spread far and wide. What could the police and the Cattivo be searching for? Are they both looking for the same thing or is their search completely unrelated?