From wiki:
Blow Job
Once you have progressed Gargan’s affection to “Trust,” Gargan will offer you a job investigating an abandoned temple that was once dedicated to a wind god. On the world map, the temple is a short way north of Northmarket. Bringing Gargan is not required, but will provide some additional dialogue during the quest.
For this dungeon, there are two special mechanisms to advance: you can jump with the wind (the flags will be blowing in a specific direction, and if you jump in that direction you will sail over the holes in the floor) and you can control the wind's direction by interacting with the four altars in the temple, just leaving a 100 sil offering.
If you want to collect all the treasure chests and reach the boss, you will need at minimum 700 sil for offerings, which will increase if you mess up your jumps and have to start over. The following is an optimal path:
- In the first room, go the far right wall and jump north until you can exit east into Room 2. Here, jump north again and follow the path around to the opposite side of the room where you can jump north to a chest with a Feather Helm. Now jump off the platform to be taken back the entrance to the temple.
 
- This time, go to the left side of the first room and jump up to a chest with a Mid Potion. Jump north again to reach the East Wind Altar at the back of the room, and make an offering to change the winds so they blow east.
 
- In Room 2, jump east to the West Wind Altar and make another offering. This will let you jump west from the far northeast point of the platform you’re on.
 
- Once you land you can exit east into Room 3. Here you’ll want to jump west from the part of the platform that sticks out into the middle of the room. Follow around to the South Wind Altar and make an offering. Now you’ll want to position yourself exactly six steps to the right of where you made your offering and jump south to land to the left of a chest containing the tome Dark and Stormy Knight (you should equip it on one of your casters, it teaches both Spells and Prayers so only Doll and Chimei don't learn anything from it). Grab it and jump south again, then exit through the southern door. Outside, you’ll find two chests, one containing a Dark Seed and the other Stallone’s Vital Vitamin. You’ll now need to go back inside and jump down to once again return to the entrance.
 
- Now that the wind is blowing south, go the left side and jump down to the chest with a Feather Mail. Fall one final time and reenter, then use the North Wind Altar in the center of Room 1. Now retrace your steps to the South Wind Altar, but this time jump south from the far northeast corner of Room 3 so you can exit east.
 
Enter the small outbuilding to fight the boss of the quest, Baby Roc. Defeating the boss will complete the quest and end the day. After the quest, the Wind Shrine becomes a repeatable daily dungeon.