This show focusses on Akira who doesn't have any reason/will/skill to be a detective but she's still going with the flow. Usually we get quick-witted leads in detective drama but contrary to that here we have a mysterious lady who doesn't show any kind of emotions and seems like a normal person on street. She have a troubled past but she's past the age to cry over that.
This is an incomplete drama since many questions were left unanswered but what I understood was that it's basically a series telling us the daily life stories of a detective whose cases always turn into something disastrous.
It's quirky and fun, I think every mystery lover should give it a try since it excels in the aesthetic setting of dark criminal world. Last three episodes are titled " Worst 10 days of akira's life" And trust me I didn't expected the finale to be so thrilling.