Answer: The word "plot" relates to several things. The argument of a story, a plan, a conspiration. What this things have in common is that something is hidden. There is a mistery behind those things, something to be revealed or to discover, bring to light. Something to hide, to conceal from the reader, another person, etc.
It symbolizes how one who believes in certain aspects, can look into circumstances, hoping for best outcomes regardless the toughness of the situation.
Same as its to microscope which provided light to somebody who has a sight problem but believes that after putting on the microscope he or she can see through.
The microscope therefore symbolized the power of believing.
