Claude enters the construction site's elevator and, after reaching the top floor, finds Miguel and Asuka Kasen dead and Maria Latore taken hostage. Claude takes a ransom letter from Catalina from a pole, which Miguel is impaled on, and reads it, walking back to the elevator quickly.
The reward for "completing" this mission is $45,000 (the money is for completing the previous mission, S.A.M.) and the unlocking of the game's final storyline mission, The Exchange.
Upon entering the elevator, the player doesn't need to do anything as a cutscene will soon begin. Once the cutscene is finished, the mission will be completed.