They are accused of 'plotting' the assassination of the prime minister. = They are accused of 'plotting' to assassinate the prime minister.
As the 'plot' unfolds [=as the story continues; as things happen in the novel, movie, etc.], we learn more about the hero's family.
He is a master of 'plot' [=he is very good at thinking of interesting stories], but his characters are not realistic.
(..) Deal. Don't you wanna see whats in the folder? You want family ties, financial networks media sources, disgruntled employees, imminent threats, homeland plots, foreign sales, health status, financial resources, tradecraft, recruiting tactics, anything else? - No, I think that covers it. - Yeah. (..)2012 Zero Dark Thirty