The Detective Agency receives an urgent request from the government to investigate a series murders perpetrated by the same culprit.
refers to the five signs that angels, at the 
pinnacle of the sixth path of existence,
è rappresentata dai cinque segni che gli angeli,
all'apice dei sei Reami dell'Esistenza,
что стоят на вершине мироздания,
предшествуют пять знамений.