21 h 21 jun 2010 ano - Percy, Frank, and Hazel sail to Mendocino (154 miles northwest of San Francisco) by boat, and is informed where to go by Iris.

Descrição:

Iris, goddess of rainbows tells Frank that the piece of wood Juno (Hera) gave him meant whether he lived or died. If the wood was burnt, Frank would die. Iris also informs Frank that in the future, he would be holding it as the wood burnt and tells Frank that Phineas (seer) would know where to find Thanatos.