Definitions:
a plan made in secret by a group of people to do something illegal or harmful

the main events of a play, novel, film, or similar work, devised and presented by the writer as an interrelated sequence

a small piece of ground marked out for a purpose such as building or gardening

a graph showing the relation between two variables.

secretly make plans to carry out (an illegal or harmful action)

devise the sequence of events in (a play, novel, film, or similar work)

mark (a route or position) on a chart