Far Cry 4 is about a man returning home to scatter his mother's final earthly form. Only he gets distracted, goes mountain climbing for a bit, helps dismantle a despotic regime, fights a tiger, runs in circles looking for an ancient scroll, lands a gyrocopter on someone's house and develops a caustic vendetta against nature's sweet-sounding fur demon, the honey badger.
This doesn't make him an absent-minded son so much as the protagonist in an excellent open-world game. Like the vessel enshrining his mother's ashes, Ajay Ghale can't accomplish anything without a player to move him, lugging him up and down South Asian mountains in pursuit of peril and the next exotic vista. And like Ghale, you get in so deep after a while that it doesn't really matter what brought you there in the first place.