In order to execute our plan successfully, Agent Helios and I had to time our action during the after-party, or else it would have been easy for anyone to tell that it was us who delivered the secret letter to Mr. Young. Aside from that was the fact that he was watching the program the entire time. The after-party was the only time people would start relaxing, drop their defenses and start socializing more.
And so, we carefully slipped back out of the scene, went into the restroom to change our outfits, and swapped with the body doubles we prepared beforehand. Of course, we had to have body doubles who would pretend to be us while we were out, or else we wouldn't have an alibi and might get suspected in case anyone was watching our moves.