How to find the Ceremonial Song shrine quest and Dagah Keek shrine
Warp to Zora’s Domain, by way of the Ne’ez Yohma shrine. To begin the quest, you need to find Laruta, a young Zora girl who's hanging out in front of the fountain. Speak to her, and she’ll tell you of a vague song. Speak to her again, and she’ll tell you about Trello, a Zora man who knows more. During the cutscene, she’ll show you exactly where to find him. (All of these locations are available in the gallery above.)
Speak to Trello, and he’ll tell you about the ceremonial trident, which he’s lost. Facing Trello, jump off the right side of the bridge and make your way to land.
Use cryonis to build a few ice blocks in the water leading in the direction of the bridge. Use magnesis and look into the water to find the ceremonial trident, and lift it out. Pick it up, and make your way back to Trello.
After speaking to Trello a second time, you’ll receive a new waypoint on your map. Follow it to a waterfall, labeled as Veiled Falls on the map. Equip Zora’s armor, and swim up the Veiled Falls waterfall. At the top, jump off and deploy your paraglider.
Your destination is the platform in the pool at the base of the Veiled Falls waterfall. When you’re hovering above it, attack and drive the ceremonial spear into the water and onto the platform.
Doing that will reveal Dagah Keek shrine. All you have to do is enter, interact with a treasure chest for a silver rupee (worth 100 rupees), and meet Dagah Keek to collect your spirit orb.