National security is at stake in this thriller about Chinese state security agents (think of them as CTU agents) trying to track down stolen data about a new military submarine that's about to enter service in 30 days -- which becomes their deadline.
This show doesn't use the real-time format, but otherwise it has pretty much all of the tropes from "24." There are moles, surveillance cameras everywhere except for a few dead zones (which of course are known to the antagonists), multiple threats within threats, and of course annoying family members who get caught up in the plot.
The primary male agent (Hong Xiaoqiu) is even a little like Jack Bauer in the sense of having a reputation of doing things his own way. He doesn't have Bauer's penchant for torturing suspects, though. The primary female agent (Ye Han) is actually the leader of the investigation, but she and Hong have some history from an incident eight years earlier, which is how the series begins.
It's not quite as violent and action-packed as "24" is, and there are nearly entire episodes devoted to exploring the backstory of many of the characters, but it's definitely addictive.
There are 30 episodes in the sole season. You can find it on YouTube (with spotty audio) or Hotpot TV, both with English subtitles available.