Plot Saver

Think of life savers but they're for the plot.

A Plot Saver is an UnTrash (as well as an UnTrash itself) that keeps the plot from going down a path that the creators find undesirable. Plot Savers that are planted in the plot come in many forms: All Just A Dream (and other similar UnTrashes), Plot Said To Do It, and Ex Machina. They're played just before some horrible (commonly fatal) thing happens to the main characters as the story] must shape itself in any way to keep them alive for future events.