What's the meaning of this

Gen then clenched his fists and thought, 'I gave up on her?! ... Alex is right. What am I doing? I won't give up on her. Even if I have a plan, I won't let him walk out of here without a fight!'

Fir then said, "Alex! Calm down! Gen certainly has a plan, right Gen?"

And Gen said, "Yes! I have a plan. We won't let him disappear with Mia even if we have to fight him, but because of the current situation we have to let him take her for now."

And Alex said, "What do you mean Gen?"

"You saw that I was doing something to her now right?"

"Yes."

"I put a mark on her body. With this mark no matter where she goes I'll be able to find her."

"What? Are you serious?"

"Yes."

And Fir said, "Now I understand why you said we should let him take her for now. You intend to rescue her later, right?"

"Yes."

"Hm, that's a good plan. This way we can think of a way to rescue her calmly."