Der Schnee der Anden(1990)

Martin Becker, a drug addict, journeys to Colombia seeking direct access to supply but vanishes. When his mother Lore is summoned to identify his body, she discovers the corpse isn’t her son, but just someone using his passport. With the aid of adventurous pilot Blain, she uncovers a jungle-backed drug ring where addicts are enslaved by the mafia. Filmed on location in Ecuador, this crime adventure follows their perilous quest for the truth.