- Raibaht gives you a Molybdenum Box (key item) in which to smuggle the Hyper Altimeter (key item) through Jeuno customs once the adventurer reveals its location to you.
- Head to Delkfutt's Tower in Qufim and use the Delkfutt Key, obtained from Mission 3-3 to open the door to the basement inside level 1 at E-8.
- Proceed downstairs to basement, and head to I-6, where the passage dead ends into a cermet door.
- Upon attempting to open the door, a message will be displayed, "A bloodthirsty monster has appeared!", and the monster Orna, and two Fomorian Spear will spawn.
- Upon defeating Orna, the two Fomorian Spears will despawn.
- Attempt to open the door again and watch a cutscene with the adventurer that was sent to kill Orna. He tells you that he hid the Hyper Altimeter in one of the streetlamps in lower Jeuno.
- Head to Lower Jeuno and search the streetlamps until you find the Hyper Altimeter, which you put into the Molybdenum Box.
- Head back to Bastok and talk to Raibaht to complete the quest.
Client: Raibaht (Cid's Lab, Metalworks)
- The adventurer hired to bring Cid a hyper altimeter has been arrested and ordered to kill a monster named Orna in Delkfutt's Tower. Find the man and obtain the equipment.