you won! There was this crazy battle on the Argo II and you won killing all the monsters finally

You, Piper, Jason, Frank, Hazel, Percy and Annabeth were all celebrating. But where's Leo?

You look around the deck and see him leaning against the mast of the ship he was smiling at you guys ever so slightly

Something was wrong, you look down to see him taking a bloody hand away from his side to see he has been stabbed.