The Adventurers City Massacre.
Everyone called it the work of absolute evil due to how gruesome the event was.
It all started with The Dead Zone, which was consistently regulated, displaying abnormal signs.
One or two Monsters would escape from the forest and attempt attacking the City. This happened within the interval of days, so while it was worrisome, it wasn't particularly a threat worth taking very seriously.
Every time the Monsters tried to assault the City, they were killed. Usually, there would be no casualty. However, in the worst case, a few people would be injured.
Still, no one expected it to lead to a tragedy; especially since it was only a few months after the Grand Calamity Class Dungeon Incident, and people were still healing.
There were plans to launch a full-sweep on the Dead Zone at the end of the year, but that was still months away.
They still had time… or so they thought.