The Lion’s Share (2001)

A former elite FSB unit, disgraced after a botched mission involving a stolen portable nuclear charge, finds themselves drawn back into a dangerous world. The "lost" charge resurfaces with bandits, forcing a reluctant reunion between a wealthy businessman, a bodyguard, and an unemployed man. Their attempt to reclaim the charge quickly goes awry, as they become trapped by the criminals. It becomes clear that betrayal is at the heart of their predicament.