you were in a cave. Trapped while your closest friends were being killed for not knowing that the food they ate belonged to the monster (posidens son). You were in shock but still managed to get out and survive

When you were at sea, you were celebrating happily to forget the sadness with your friends that still survived. That's when a storm arrived, and your ship ended up at posidens layer

"YOU KILLED MY SON!"

you: Sir, we were just protecting ourselves -

"DO YOU KNOW WHAT THE LINE IS BETWEEN A HERO AND A FALSE ONE...!?"