Lyria is pregnant and needs to go to the Cave of Birth, but she is too weak to get there. Mia goes with Mo and Yuko in search of the cave - they ask the Water Unicorn for help, who makes the Wind Unicorn appear.

Still anxious since the tragic events of her last visit to centopia, Mia can no longer concentrate on the important things, like doing her homework or taking care of Vincent, her best friend.