you were given a mission to assassinate one of the Straw hats crew member, Roronoa Zoro. you were sneaking into the banquet the straw hats were partying. You managed to lead Zoro separated from other members, you made your move and jumped him.

Zoro turned around and took out Wado Ichimonji and managed to block your attack "oh? Your quite the sneaky one for an assassin. Who send you?"