It is midnight in Crackledawn. Everyone is waiting for the phoenix to rise up from the forests of Everydark and renew the magic of the Unmapped Kingdoms.
But there is no sign of the phoenix tonight. Something else emerges from Everydark instead: a harpy bent on stealing the Unmapped magic for itself.
Once every hundred years, mermaids and witches get together for a PARTY! Mermaids Beattie, Mimi and Zelda can´t wait to meet a Real Witch, but when Tiga Whicabim unexpectedly appears in the Hidden Lagoon before the celebrations begin, things start to go magically, marvellously megalodon-sharkally WRONG.
Get ready for a once-in-a-lifetime underwater...