The mission starts: when you talk to Alikibiade after you complete the main quest.

Description: Upon starting this quest go to the location shown in the screenshot above – Akrokorinth Fort.

That is where you’ll be attacked by the competitions. Kill them to get in the building. There, you’ll meet a guy — give the package. After doing this, return to Alikibiade to complete the quest.

As a reward for finishing this mission, you receive the Alikibiade’s Axe and about 200 coins.