This is a Maximum Ride/H2O Crossover. A Avian Human named Ava is sent to Austrailia, where she inadvertantly becomes a mermaid. She then has to figure out how to hide a pair of wings, and stay away from the water. Not to mention she has two scientists watching her every move in her own house...

Max and the flock thought they were the only surviving mutants from the School. Cleo, Emma, and Rikki thought they were magical mermaids. How do these two groups of friends fit together?