The Warehouse Key side-quest is short little mission that takes you searching the docks area of Ruan for a lost key. It is made available during the Orphanage Crisis mission and expires after entering the Jenis Royal Academy.

Client: Harg
Pay: 1000 Mira, 2 BP
Bonus: None
Difficulty: Medium
Locations: The City of Ruan
Description:

I lost my Warehouse Key somewhere, and I really need it! Please find it ASAP!

For details, come see me at the harbor.

1. Seems as though he dropped the Warehouse Key near the harbor.
2. Guess our only option is to walk around the harbor looking for it.
3. We found something shiny in the water just off the plank bridge by the bar!
4. Fished out the Warehouse Key! We should return this rod now.
5. Gave the Warehouse Key to Harg.

Once you receive the quest from the Ruan Bracer Guild at the beginning of the Orphanage quest, see Harg, who is located at the western edge of the docks near the crane. He will give you excuses and "tips" of where he last remember having the key.

As you search the area, you will likely notice a lower level that passes below the bridges. That is the location we need to explore. South of the crane, next to the southern warehouses, you will find stairs leading to this lower level. Follow this to the end, and you'll find something shiny in the water.

Due to its depths, we cannot get to the object. We'll need to locate an item with a very long reach, like a fishing rod. Go to the Aqua Rossa Bar, and speak with Squaro to borrow a fishing rod. If Squaro doesn't offer the rod, go upstairs and investigate the fishing rod display first, then speak with the Squaro again.

With the rod, you can now return to the shiny object and obtain the key. If you forget about returning the rod, you will be forced to return it at the beginning of chapter 3.

Return the Warehouse Key to Harg to earn his gratefulness. Unfortunately, this game as no other fishing quests, so you can give the fishing rod back to Squaro. We can now return to the guild to claim our reward.