The video above is the The Witcher 3 Wild Hunt The Lord of Undvik Secondary Quest Walkthrough and shows how to complete The Lord of Undvik, the quest featured in The Witcher III: Wild Hunt.
The video walkthrough covers the following objectives:
Ask Crach an Craite about Hjalmar.
Ask around at the New Port Inn about Undvik and the ice giant.
Sail to the island of Undvik and search for Hjalmar.
Explore the ruins of Urskar and search for signs of Hjalmar’s presence using your Witcher Senses.
Explore the boat’s hull.
Talk to the stranger.
Find Hjalmar’s camp.
Explore the remains of Hjalmar’s camp using your Witcher Senses.
Use your Witcher Senses to follow the tracks of those who fled the camp before the attack.
Find the man the trolls captured using your Witcher Senses.
Help the man in the cauldron.
Follow the boat trail using your Witcher Senses.
Cross the lake.
Find out what happened to Hjalmar’s crew in the caves.
Find Hjalmar.
Help the stranger drive off the sirens.
Find a way into the giant’s lair.
Find the key to Vigi’s cage using your Witcher Senses.
Avoid snow—the sound of it crunching under your feet will wake the giant.
Kill the giant.