A group of friends band together to hide the truth about a mutual friend's tragic death. They soon discover that an evil entity is in pursuit of them.

A group of humans arrive on Sirius 6-B to investigate an SOS signal sent out from the planet, which has been supposedly deserted since the destruction of the man-made weapons known as "screamers." Once the squad arrives, they find a group of human survivors eking out an existence in an old military outpost, but more important, they discover that the threat of the screamers has become even more insidious, now that they're able to morph into human form.

A small town is attack by ravens and doesn't know why the ravens are working together.

An Alaskan town is in danger of destruction by a mystical snow globe that appears on a family's doorstep, wrapped like a Christmas gift, and causes deadly "natural" disasters in the real world, while simultaneously occurring in the globe.