Yes

Daemon II had gained well over eighty Thousand Unsullied for His Sister, and now as he bid farewell to her to set sail for Kingslanding, Varys would assist him in finding Holes in the Red Keeps Defense, his Real Target was Myrcella Baratheon, she was said to be quite beautiful, and only just Turned Eighteen. Honestly he was suprised She was already married, she should have been wed in at least her fourteenth Year, and pregnant a Year later. But that wasn't the Case. Daemon II was hoping that Myrcella would be sleeping by the time he arrived, so he could slip into her room through the secret Passages King Maegor had built and take her out the same way. It would be a tight window of opportunity, especially more so with the Starks in the Capital.

As his Ship came within sight of the Harbor he left in a small sloop and Went to the meeting place to speak with Varys. He had to hide his Face and Hair, or risk discovery. As he crept into the Sewers and found Varyw waiting he explained his plan to kidnap Myrcella and Turn her to his side. Varys wasn't sure about it but agreed nonetheless.

(Maegor's Tunnels)

As Daemon II mmade his way up through the Tunnels and Found himself in Myrcella's Bedchamber, he found her perfectly sound asleep. So the first thing he did was Gag her, and then tie her up and went to Escape with Myrcella as his captive. Sadly A maid came in at the last second. And with little options at such a crucial stage he knocked her out, and tossed her down the Long drop, hoping that'll buy him so exra time.