There are plenty shows which start well and then, after a couple or so episodes, go downhill. This show is one of them. Though the final episodes somewhat improve after very boring middle.

What's odd, though, is that acting is rather OK at first but then gets worse instead of improving.
I'm not sure who is to blame. The screenwriters, who took an interesting premise and barely made use of it throughout the show focusing on flashbacks, pointless details and stilted dialogues instead, the director, who hardly helped the cast to deal with the tepid script, or the editor, who often failed to combine the scenes into a coherent, flowing story.

The music was nice though.