chunk: Dominick "Dom" Cobb (Leonardo DiCaprio) and Arthur (Joseph Gordon-Levitt) are "extractors", who perform corporate espionage using an experimental military technology to infiltrate the subconscious of their targets and extract valuable information through a shared dream world. Their latest target, Japanese businessman Saito (Ken Watanabe), reveals that he arranged their mission himself to test Cobb for a seemingly-impossible job: planting an idea in a person's subconscious, or "inception".