Fathers (movie, 2010)

A humble history teacher Alexander Lvov, happily married to Anna, a woman with a child. His adopted son, 8-year-old Vanka, has long become Alexander's family. But here comes back from the army paratrooper Vadim Kotov, who served under the contract, Anna’s ex-husband and Vanka’s father. He wants to get his son back. In men, a serious conflict is brewing.