After returning from a business trip overseas, prosecutor Miles Edgeworth enters his office to discover that something has been stolen...as well as a corpse! With his faithful (but slightly dimwitted) detective partner, Dick Gumshoe, as well as his own sharp mind, this is one criminal that will regret being so brash as to cross Prosecutor Edgeworth!
In Ace Attorney Investigations, you become Phoenix Wright's prosecuting rival, Miles Edgeworth. Unlike previous Ace Attorney games, you do not take part in courtroom battles. Instead, you examine crime scenes, collect evidence and counter-argue inconsistent theories as to how the crime took place. Exploring specific locations in crime scenes will make Edgeworth store an idea in his memory, under a "Logic" section. When enough ideas are formed, the player can link up related ideas up to prove that new evidence is relevant or to form a counterargument.