A young filmmaker, Ali Tabrizi, sets out to record all the evidence of abuse and harm being perpetrated throughout the fishing industry he can find across the world. Each place he visits with his wife Lucy Tabrizi, the film's co-director, he uncovers more and more shocking evidence of ocean life eradication.
Taiji, a small fishing town in the south of Japan, is the first place that leaves the audience disturbed. Ali films a gruesome scene of dolphins being slaughtered as their pod is driven close to shore. With the sea red from their blood, only a few survive to be transported to water parks for entertainment. As there is high demand for bluefin tuna, the fishermen reduce the dolphin population to decrease the consumption of smaller fish, such as herring or mackerel, leaving an abundant amount of bluefin tuna.