The main line here is a cop killing a drug dealer, thinking he was in a self defence, that the pusher was armed. The Internal Affairs are on the case. We have seen this one hunderd times before but that's the unavoidable scheme in a cop story. But was this the true reason to kill the dealer? Was there nothing else?
For the rest, the red string of this TV show: relationships between the male and female cops. Forget it. Focus on the main line instead.
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