“Siberia” (** out of four) was a muddled melodrama about an American diamond trader (Keanu Reeves) whose Russian partner goes missing and he ventures off to Siberia to find her but soon finds himself in the midst of a love affair with a femme fatale (Ashley St. George) and in escalating danger with the Russian mob and other underworld figures. Lumpy mix of love story, underworld intrigue, and international espionage never satisfies as a whole and never gets going. Reeves is stiff and seems to be more-or-less playing the same role as he did in “Johnny Mnemonic” more than 20 years ago. Film doesn’t end so much as stop but you probably won’t be complaining.