Ace Attorney Investigations Miles Edgeworth is composed of several lengthy episodes. In the first episode, an argument in Edgeworths office results in a mysterious murder. Edgeworth, coming back from a one-month business trip, enters his office and encounters the body of the man who was shot. He is then threatened by someone who is presumed to be the suspect with a gun from behind. In the second episode, Edgeworth wakes up after being knocked out due to an air pocket accident inside a luxury airliner flying through turbulence. Shaken by the flashback of nightmarish past memories, he opens the onboard elevators door, only to find a male corpse. At this very moment a cabin attendant witnesses the scene and Edgeworth is made a suspect of murder!

Miles Edgeworth will have to confront suspects and get to the bottom of his cases by collecting information and evidence through detective work between key locations. Also, in the logic mode that symbolizes Edgeworths logical inferences, users can discover new information and evidence by combining two pieces of information out of the collected pieces. The real culprit that will be revealed through investigations and witnesses will be confronted in a battle similarly fought (Testimony Pursuit Press Confront) to that of the Court Battle in the Ace Attorney series (Testimony Cross Examination) to expose the contradictions.

Starring Miles Edgeworth, the popular rival of attorney Phoenix Wright
Gameplay moves out of the courtroom and onto the crime scene
New investigative style using the Nintendo DS stylus to uncover evidence
Several unique cases to solve with over 15 hours of gameplay
New technique, such as logic mode assists you in uncovering the crime
Unique dialog trees and interrogation techniques let you question witnesses to discover the truth