Loud explosions are ruining sleep for hundreds of Scottsdale residents in the hot July nights, including members of the St. Rose Quilting Bee. Things become serious when Maggie's police officer son is injured by one of the blasts. Then a church member dies when an explosion topples a roof onto the lounge chair where he lies sleeping. Some Bee members think bored teenagers may be playing with fireworks, but Edie is thinking terrorists. The others scoff - until a bomb at a power substation throws the entire neighborhood into darkness.