Eastern Promises starts off with a gruesome murder on command, and it only spirals downward from there. A young pregnant girl named Tatiana is admitted to the hospital, under the care of a midwife named Anna (Naomi Watts). She dies giving birth, and Anna feels that it’s her responsibility to find the baby’s next of kin. Among Tatiana’s possessions are a diary that’s in Russian, and also finds a business card inside to a restaurant run by Seymon (Armin Mueller-Stahl), a nice but my serious man that shows great interest in the diary. At the same time his son Kirill (Vincent Cassel) and Kirill’s driver Nikolai (Viggo Mortensen) are fixing up a nearby mess, and their actions collide with some startling truths reveled from Tatiana’s diary. With the Russian mob becoming more interested in this, Nikolai is sent into Anna’s world, and neither are prepared for the consequences to the actions that the diary put into motion. Anything, and anyone, mentioned in it must be eliminated, at all costs.