It's almost Christmas, and Eric Hagel is spying on the new neighbor. What's going on next door? Why is the house always flickering with candlelight? And what about the eerie flute music every morning at 6:00? When Mr. Tressler puts up a Christmas tree, Eric's eyes nearly pop out. The angel at the top comes to life! Soon, hundreds of angels are flying in the old man's house. Can Eric and the Cul-de-sac Kids solve the mystery? And who will be brave enough to take a Christmas gift to the weird house at the end of Blossom Hill Lane?