When Andre duCleau's Will leaves his entire estate to his runaway son, Francois, daughter Antoinette is forced to make a drastic choice: Find her brother or live in poverty. She chooses the later and travels to Leonesse disguised as a young nobleman. Antoinette doesn't find Francois, but she does find a home with the city's flying squadron, the Mothmen. Once the guardians of Leonesse, these brash young men took to the air in flying machines created by King Georges' Venitani inventor, but now, they and their brave deeds have been almost forgotten...until war again arises. Secure in her disguise, Antoinette is ready to fight...until her feelings for Etienne, a fellow flyer, get in the way. What will happen if Etienne and the others discover her secret? Will they denounce her or will they accept as The Seventh Mothman?"