Every idea is a blockbuster.
Aliens invade earth, and the people in the small town of Trego, Nevada take shelter in the only brick structure in town: the newly constructed Don's Hardware. Since the aliens do not want to risk having the humans use nuclear weapons, which would ruin the planet, they are using hand-to-hand combat only. The Trego-ians are forced to use the only weapons available to them: the contents of Don's hardware.
When a witch doctor is evicted from her home to have a Menard's constructed, she puts a powerful curse on the first truckload of product to arrive: exterior doors. Each door is a gate to hell. The only ghost response team in the region is composed of Simon Pegg and Nick Frost (Shaun of the Dead). Hilarity and chaos ensue.