“The River” ponders whether you can go home again, particularly if you’ve never been there. When Alfa (French rapper Stomy Bugsy) kills his drug-dealer boss in retaliation for a friend’s death, his brother cryptically suggests he leave Paris and “go toward the river.” Accompanied by sassy Senegalese cousin Marie (Auriele Coulibay), he embarks on a road trip back to his disdained African roots. Pic possesses a picaresque charm, plus feisty persona of Marie. But Bugsy is so unflaggingly morose, it’s hard to understand what Marie sees in him. Pic, yet to find a distrib in France, stands little chance in the U.S.