Last time i checked, that's a daily quest.
There are four daily quests, and each day it changes.
I.e Day 1:
Knock, knock on wood.
I.e Day 2:
Quest x?
I think that's what that quest is. Every day it rotates through one of the daily quests. Doing all of them gives you the trophy "Argan all-star" which then enable's access to the beach if you follow that quest-line.