Joey Scavello is the main character of this book. He's 6 years old. His mother is Christine Scavello, she owns a gourmet shop in California. The two of them live together near LA.
The Church of Twilight is a cult that becomes set against Joey, saying he's the anti-Christ and he must die. The Church of Twilight is led by a supposedly psychic lady, named Grace Spivey.
After Spivey makes strange phone calls to them, and after she kills Joey and Christine's dog, she hires a private detective to help them. His name is Charlie Harrison.
Harrison puts bodyguards with Christine and Joey, but as soon as they get home, two of Spivey's men invade the house and kill the bodyguards. Christine and Joey manage to escape, and leave the city.
They do some research to find out about The Church of Twilight.
Harrison travels with them from LA to Sacramento while trying to get rid of The Servants of Twilight. But every time they stop somewhere, Spivey uses her "psychic powers" to find out where the boy is hiding. They keep showing up, trying to kill Joey.