This quest is not available in game.
Executor Zygand in the town of Brill wants you to assassinate Captain Melrache and his two bodyguards.
Scarlet Crusaders have been raiding from the ruined tower in northern Tirisfal, past Faol's Rest. According to the information we have, a ruthless commander named Captain Melrache is in charge of this evil crew.
I am entrusting you now with a special and dangerous mission. Slay Melrache and his two bodyguards, in the name of The Dark Lady.