Rikuo and his family is the last of the Mermen. When an evil force came and threaten them, he went to stop whoever is behind it.
Rikou hears the voice of his son, Ricky.
He quickly dives in to save him.
He rescues Ricky and a new friend, Micky.
They saw that with Jedah's power gone...
The barriers that isolated Micky's home is lifted.
The two sister species became friends.
Night Warriors ending