You mean all the stuff in Macau? That’s just the setting, really. You need that backstory to understand why Shi Yoon is so determined to figure out who outed his crew and mission.
The most fun is watching these old/retired spies be normal people (and watch the bumbling but adorable Chan Gyu [Soo Hyuk] attempt to spy on professional spies, like, good luck with that, dude). The charm for me is the characters and how they’re all underdogs banding together to save the neighborhood from being ruined by corporate developers. There’s more to it than that, but that’s the bit that most interests me – the spy stuff (as set up in Macau) isn’t, but we need that brooding mission underpinning the other stuff.
I’m pretty sure I’m not alone, though, in saying that Soo Hyuk is definitely stealing the lime-light. His character is just so adorkable you can’t help but root for him.