Elida, the daughter of a Carja noble, has gone missing. Her father fears suicide, but still hopes she may be found.
Aloy has been tasked to search for Elida. A good start would be in their Garden which is her last known location. Go to the Garden and use the Focus to scan for clues.
Elida has left some tracks at the Garden. Follow them to a boathouse and then swim across to the Island.
When you get to the Island you will have to Kill a Snapmaw and protect Elida from it. After killing the Snapmaw investigate the Island and speak to Elida
Aloy must now find Atral. Investigate his signal fire on the other Island.
Follow his tracks and you will find the Shadow Carja. Kill them to get to Atral and speak with him.
Go to back to Elida to bring the news and complete the quest by speaking with Lahavis, Elida's father.