Crisis in the House of Falcon. After an adventurous journey, Falcon has arrived home. There is no problem in the Falcon family, the corresponding message was again a ruse to bring Falcon home. At the port, Ryoma's Power Stone is stolen by a stranger. Octo and Pus also appear again and want to poach Cassie, who now works as a maid for the family, for their new boss, whom nobody knows. She refuses. Just before dinner, Falcon and his friends confront the thief of Ryoma's Power Stone. A fight ensues. Even Apollus transforms and helps defeat the monster the thief transformed into. He is also a being without memory like the dog of Hades.