The film is based on the second book from the Adventures of Erast Petrovich Fandorin series of novels written by the Russian author Boris Akunin. The film takes place in 1877 during the Russian-Turkish war. Erast Fandorin has just escaped from Turkish prison and is trying to get on the Russian side as soon as possible to give important information about the upcoming attack of the enemy. On his way he meets Varvara Suvorova, a young lady who is going to see her fiancée - a soldier of the Russian army. Erast also knows that there is a spy somewhere in the Russian army, everyone is under suspicion.
After their father (Tim Robbins) is called into work, two young boys, Walter (Josh Hutcherson) and Danny (Jonah Bobo), are left in the care of their teenage sister, Lisa (Kristen Stewart), and told they must stay inside.
While visiting his hometown during Christmas, a man comes face-to-face with his old high school crush whom he was best friends with -- a woman whose rejection of him turned him into a ferocious womanizer.
Disgraced Navy SEAL Shane Wolfe is handed a new assignment: Protect the five Plummer kids from enemies of their recently deceased father -- a government scientist whose top-secret experiment remains hidden in the kids' house.
Yuri Orlov is a globetrotting arms dealer. Through some of the deadliest war zones, Yuri struggles to stay one step ahead of a relentless Interpol agent, his business rivals, even some of his customers who include many of the world's most notorious dictators.