Sammy pushed Patrick down the building and they both fell. Sharon read the diary and found out Sammy (Kobe) is an undercover. Michael walked in and told Sharon the secret that Sammy and Ada were undercovers.
Michael to Sharon:
Michael: “Because of you, Kobe wanted to give up being a UC and be reinstated many times. You’re his driving force, as long as he thinks about you, he’s not afraid of anything. Kobe feels guilty about the miscarriage, he wanted to kill himself. It’s dangerous to be a UC but Ada and Kobe persisted. When Kobe wakes up, I hope you’ll support his decision carrying his mission.”