no he got a call while the plain was delayed and got off the plane
"other than getting off the plane did nothing to stop it" I clearly know that. I'm saying he could call and send someone to yeonwoo's location, either from his grandfather's side or one of his alpha friends. it just doesn't make sense to me
my understanding based on ch.48 and 49, was that he got off the plain after getting the call because he was suspicious, and then he DID go to Yeonwoo's place and/or called the secretary which is how they found the cctv footage which the secretary said was from 2 hours ago(because the other alphas with him asked "did you find him?" and he answered "jo sunggyun took him", and so it was already too late because 2hrs had passed).
But yeah i agree its a weak plot point that Kim Shin didn't assign a bodyguard or surveillance to Yeonwoo when he knew there was still a threat around.
okay so did shin know they were gonna do smth to yeonwoo?? but other than getting off the plane did nothing to stop it?? this is actually driving me insane. also you'd expect someone as crazy as him to put a bodyguard or smth on his oh so "precious" omega.. BUT NONE??? this is just stupid. it was good until s3 but then it went downhill, worst ending I've ever seen.