Polka is about to resume business as usual when he gets two unexpected houseguests: his niece Sayo and her bodyguard! Do the pair just need a place to crash, or is something more sinister at play? And Inspector Iwanome is still on Polka's track.
They're called Heilei, "Black Lightning," 
and they mix old and new methods.
،"إنه يدعون هيلي، "البرق الأسود
.وهم يمزجون بين الأساليب القديمة والحديثة
Man nennt sie Heirei, der schwarze Blitz,
On les appelle « Heilei »…
Viene chiamato "Heilei", fulmine nero,
São chamados de Heilei, "Relâmpago Negro",
e misturam novos e velhos métodos.
Их называют
 «Чёрная молния» Хэйлэй,