Lugh is hired to assassinate Dia by her father Count Viekone, who is an old friend of Lugh's father Cian. Cian asks Lugh to fulfill Count Viekone's request, saying he'll carry out the assassination instead if Lugh turns down the job.
It's what's known as a slipstream.
أي ما يُعرف بالتيّار الانزلاقيّ
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ein Windschatten erzeugt.
Sto cavalcando la cosiddetta scia.
Ou seja, é uma esteira de turbulência.