“ZeroZeroZero” is a lavish, bleak mini saga of a massive smuggled cocaine deal, weaving between three equally nihilistic tales. In Monterrey, Mexico, a soldier (played with mesmerizing intensity by Harold Torres) involves his squad in a cartel assembling the drugs and shipping them to Italy. In Calabria, an aging, evil overlord (another stellar performance, by Adriano Chiaramida) spars with his aspiring grandson as they await the shipment. And the dealmakers in between are a Florida family (memorable acting by Andrea Riseborough, Gabriel Byrne, and Dane DeHaan). A study in evildoing, “ZeroZeroZero” is not for everyone; death stalks every scene and no lily-white hero leaps out. Instead, the eight equally gripping episodes cook ferociously, tension bubbling, amidst sumptuous cinematography and an industrial-brooding soundtrack. As someone endlessly baffled by and obsessed with humankind’s potential for darkness, I was held in thrall. Only at the end, when the three stories are played out and intersect, was I let down somewhat; the overall narrative arc seems to lack change and resolution. Be that as it may, “ZeroZeroZero” is compelling, black-hearted viewing.