Ограбление

A woman with a gun walks into a bank to rob. Once everyone was taken hostage, the CCTV was turned off. A police team led by Inspector Natasya arrived to negotiate and contact the robbers. After successful negotiations, the three hostages were released. Unbeknownst to the police, the released hostage was a friend of the robber and the robber himself. The robbers have their own history that compels them to rob. What is their real story?