Maia is having the worst day of her life. She gets rejected by the Ocean Agency, gets kicked out of her house, can't find a job that offers room and board, gets her wallet stolen and gets taken hostage and then shot.
When Maia passes a laurel tree it sparks old memories from her past. Everyone decides to spend an extra day in Siberia looking for clues about Maia's past.
The 100-year anniversary of the underwater cities raising to the surface is celebrated. The 100-year memorial service for the city of Elpida is also held. Maia, Tsukasa and Millie have a race to show off the Ocean Agency's new hovercraft.
Maia is unable to concentrate on her new mission which is to find a girl that has been kidnapped by the slave traders. Shizuka is injured due to Maia's lack of concentration.
Maia is told the reason behind her false memories. Tony tells the Nereids about Maia's capture. Shizuka, Yu and Gloria quit Nereids on account of Rena's apparent cold-heartedness towards Maia's situation. Tsukasa returns from Greenland City and is immediately taken by Shizuka to help rescue Maia from the Ocean Agency.
While the treasure hunters chase off the Ocean Agency's pursuit vehicle, Maia descends into the shell of the city proper. Once inside memories flood her mind.
