It's basically about 6 kids, all between the ages of 6-14, who were experimented on at birth. There DNA had been mixed with avian DNA, so they are only 98% human, but 2% bird. They have wings, and they have other powers (which they discover throughout the series). It's an interesting series because you learn a lot about the hardships of responsibility, leadership, friendship, love, etc. They are at constant war with their creators, so it's got a lot of action and fighting in it.