In MySims Agents on the DS, you take the roll of an agent assigned by the agency to help a mayor stop a notorious thief from stealing an ancient treasure. You must search for clues, solve devious puzzles and match wits with the mysterious thief in order to protect the treasure. Your investigations will have you talking to your favorite mysims and searching for clues in underground caverns. Only the brightest and best agent will be able to put the pieces together to solve the case and stop his wicked plot!