Europe is prosecuting human rights activists that help save lives in the Mediterranean Sea, where thousands of migrants and refugees have drowned as they attempt to evade some of the world’s most powerful naval forces and reach European shores in search of a better life. The charges, allegations of human trafficking that could land activists in prison for decades, have been helped along by a spy, a former private security guard who posed as a sympathetic worker on rescue boats and passed on information to Italian authorities and right-wing politicians. Journalist Bartholomäus von Laffert spent years with many of the people at the center of the case, and introduces us to the activists and spies whose allegations could end up making an already dangerous sea crossing even deadlier.