Percy Jackson's quest is to retrieve Zeus's master bolt.
Zeus sends Hermes to Calypso to tell her to release Odysseus.
Zeus sends Hermes to release him from calypso or Zeus will drown her island so he lets Odysseus be on his way
Zeus' messenger was Hermes, (the Roman Mercury) his son by Maia, daughter of Atlas.
Percy Jackson's quest is to retrieve Zeus's master bolt.
Zeus sends a lightning bolt
Then Zeus will come and give you a quest.
Zeus, the Esroh.
Your quest on Mythology Island is to give Zeus the 5 items;the rose, the whisker, the scale, the pearl, and the golden ring. To do this, you have to get the apple (to summon Zeus and then actually get the quest).
To get the lightning bolt back from Hades, who Chiron assumes has it, and return it to Zeus before the Summer solstice.
Naturally he sends the messenger of the gods: Hermes.
zeus is mad because humans are disrespecting the gods so zeus sends hades to try to scare the humans into thinking they need the gods. also zeus sends hades because zeus is getting weak because people dont pray anymore.