Sam and Dean Winchester end up camping in an unoccupied house. However, they notice strange things seem to happen whenever they leave to investigate in the nearest town. At first they think maybe it is a ghost or poltergeist.
It turns out to be a small angel figurine (aprox. 6-7 inches tall) named Angeline (pronounced Angel-line). Her 'father' was an artisan who carved her out of wood. She can change forms between her wooden form and her flesh form with a small shimmer of light.
She asks the brothers to help her find her father who disappeared on her tenth birthday. It doesn't take much to figure out that her father had sold his soul to bring her to life and had been killed by hellhounds. The brothers take her back to the bunker where she lives from then on.