Like other treasure hunts, the hard part is starting the quest.
You are looking fora corpse with a cargo manifeston it.
Reading the note willstart the quest.
It is just off the coast, underwater.
UseWitcher Sensesto make this part of the quest easier.
It willgive the chest a yellow outline,helping you spot it in the dark ocean.
It would be difficult to see the chest otherwise.
The quest will end after youopen the chestand claim the treasure within.
Talk to Vimme Vivaldi to make the trade.
Next:The Witcher 3: Complete Guide And Walkthrough