The Crows' Warning

Twins Samantha and Dean are staying at their uncle Aldus's Reptile House in Ravens Pass. Almost immediately, strange things happen. After Uncle Aldus locks the twins in the upstairs apartment, they hear loud footsteps and glass shattering on the first floor. When all is quiet, they break out of the apartment to find their uncle badly hurt. Set back in the woods and with no cell signal, Sam and Dean must help their uncle on their own. With the protection of a murder of crows, will they be able to get to figure out what--or who--has attacked their uncle and why?