Related Clues:

• Schemer's creation
• Be a schemer
• Plot in secrecy
• It might have a twist
• Book basis
• It might consist of a 19-Across
• Whodunit component
• Central story line
• Movie's story line
• It might thicken
• It usually thickens
• Coup start
• Underhanded plan
• Whodunit foundation
• Whodunit kernel