A pregnant constable, Jo, acts heroically to rescue an infant during torrential rains and flooding. She has been promoted to Trainee Detective at the same time, and, after finding a dead murder victim in an elevator, she is keen to investigate. Too keen, perhaps, as she runs an unauthorized DNA check on the corpse, in haste.
Here's an interesting plot point: apparently, the DNA check, to a PRIVATE database (nothing turned up on the Police version) is ILLEGAL (???) in U. K.--hence, she faces dismissal and even jail time, if caught. Is that true? Maybe in England, but we see historical cases being solved in USA & Canada via those sources. So, the notion that the submission by an officer is a felony seems bizarre. Anyway, she gets a 'hit' and that drives the rest of the story.
I like these Euro 6-part series (3 or 4 is better), but even they can't resist the filler (including needless profanity) that better writers could skip. Nonetheless, good performances by Sophia Rundle (Jo), Lorraine Ashbourne (as her crusading Mom, Jonas Armstrong (her spouse & shifty fellow cop, Lee) and, one of my favs, PHIL GLENISTER, as a shifty contractor, who cuts corners to keep his head above water, wgilst citizens are sinking BELOW water.
The wrap-up is quite unique, with a few characters embroiled in borderline (or serious) violations. What to do? Leave it at that, or run a second season? I'm happy to believe that we can just tie it up THERE and draw our own conclusions --not that easy to predict!