You and your comrades were on a ship, after defeating the dangerous beast and ya'll were going back to the camp for celebrate.

It passed two months because of some more monsters, but this one was new... There were sirens. You obviously noticed and filled you're comrades's ears with beeswax. The siren took the form of your mother (or partner) and tried to lure you into the water.

Your father Ares was watching you, his child, from the Olympus, as your comrades fought the sirens off the ship.