To coincide with the launch of the full series on All 4 from Friday 12 August, the first episode transmits on Channel 4.
Walter Presents - which showcases the best foreign language drama series from around the world - continues with this atmospheric crime drama from Ukraine.
When little Alina disappears from her father Borovko's apartment, recently transferred senior investigator Varta is assigned the case. Uncommunicative Varta gets an unwilling partner, a demoted detective Maksim, who is under investigation along with his previous partner.
Borovko does not know what happened to his daughter and is evasive when questioned. He also proves to be angry with his ex-mother-in-law Saenko, who has custody of Alina and wants to involve her in a religious cult.
After a search, the two detectives find evidence that undermines Borovko's insistence that he has no idea what has happened. Varta's instincts guide her to a plan, but before it can get going, an unexpected tragedy occurs.
Starring Yulia Abdel Fattakh, Pyotr Rykov, Oleksandr Kobzar, Vyacheslav Dovzhenko and Yakiv Kucherevskyi. In Russian with English subtitles.