The TV series "Bloody Mary" is a Russian dark comedy about the search for a missing diamond. Entrepreneur Dolinsky secretly acquires the world-famous precious stone with the peculiar name "Bloody Mary" without his wife Albina's knowledge. Upon learning about it, Albina decides to get her hands on the expensive "trinket" and adds poison to her husband's tea. She doesn't want to kill him but plans to give him the antidote in exchange for the diamond. However, at the most crucial moment, several audacious contenders for the gem appear on the scene.