The eventful events of these seven... eight demigods.

 1) Hecate, the goddess of magic, asks Hazel to be her little pawn and learn how to bend the mist because it is the only way to save her friends.

 2) Frank has two voices in his head, the gods Ares and Mars, more wildly known as the gods of war.

  3) Percy and Annabeth are stuck in Tartus and now Bob, the Titan, has come to try and help them reach the Doors of Death.

 4) Hazel learned to bend the Mist and trick Scrion allowing the other seven and herself a safe passage onto the Doors of Death.

  5) Nico has told Jason of the real reason why he left camp Half-Blood, why he could never look at Percy the same way.

  6) Annabeth and Percy have now traveled farther into Tartus, they have also figured out that Tartus is a body.

  7) The snow goddess has decided to make a scene, she sent Leo to Calypso, a Titans daughter stuck on her little island.

  8) Leo has now made an impossible promise, but he has to keep it in order to stay alive, after all he did swear on the River Stynx.

 9) Annabeth and Percy are finally out of Tartus, and the Doors of Death are closed.

10) Nico is taking the Athena statue back to camp Half-Blood while the rest of them continue on to Athens.