With Mason's Help

Some storms take everything. Some leave something behind.

Three years ago, a Coast Guard father and his five-year-old son died in what investigators called a weather-related crash.

Katelynn is a senior at LSU who has loved the sky since she was a little girl. Then a small, worn model airplane turns up on a rainy day in late October, and a little boy with a mission lets her know he needs her help.

What follows takes her from a Gulf Coast air station to an unsolved murder in New Orleans, and int...