Say it once... Say it twice... But we dare you to say it THREE TIMES
Barbara and Adam Maitland decide to spend their vacation decorating their idyllic New England country home. Upon returning from the trip to town, however, Barbara swerves to avoid a dog wandering the roadway. The couple's vehicle crashes through a covered bridge and plunges into the river below, killing Barbara and Adam. The couple soon returns home in spirit form and, based on the fact they have no visible reflection in the mirror, quickly come to the conclusion that they are dead. A book entitled Handbook for the Recently Deceased confirms the couple's suspicion that they are, in fact, dead.
Adam then attempts to leave the house to retrace his steps, but finds himself in a strange otherworldly dimension referred to as Saturn, which happens to be covered in sand and populated by enormous sand worms.