Spain's Atlantic port of Vigo runs the biggest shark trade in Europe, part of an industry worth billions of euros a year in which EU fishing crews earn around 12 euros per kilogram of fin while a bowl of shark fin soup in Asia can cost 1,500 euros. Marine biologist Lukas Müller inspects the tons of shark meat sold there and finds most of it comes from young animals that never reached reproductive age. The film follows the Stop Finning campaign, whose petition has gathered over a million signatures and pushed the European Commission to consider an EU-wide ban on the fin trade, and sets activists against Vigo residents whose livelihoods depend on the fishing fleet. Interviews with fishers, campaigners, and scientists lay out the economics on both sides: a market built on cheap European labor and Asian demand for a luxury product, and a shark population that biologists say cannot sustain the current rate of catch. The film asks whether the trade can be reformed before the species it depends on run out.