Billy falls madly in love with Nilo, but discovers that her great love is polyamorous. Explosions in the heart studies the turbulent and impossible romantic relationship between two young women where one is polyamorous, and finding one’s own autonomy and power independently of others.
Robert moves from the Polish countryside to work on a fish processing factory on the coast of Norway. There he falls in love with Ivar who is openly gay and a member of the workers union. Robert is hiding his sexual orientation from the other Polish immigrant workers. When Ivar helps the Polish to start a strike for better working conditions at the factory, Robert has to choose between money or love.
During World War II, millions of Jews from all over Europe are deported and killed in German concentration camps. When the German troops invade Norway, the Norwegian Jews feel safe and protected. But anti-Semitism knows no borders and as the war escalates in Europe, the situation changes drastically. Suddenly, their radios are taken away; their passports are stamped with a big J and one day, all the men men over the age of 15 are arrested and taken to prisons camps. Many of the women left behind are too frightened to escape and are desperately waiting for their husbands and sons to come back home. On November 26, 1942, hundreds of Jews are picked up by the police in the middle of the night and are transported to the dock in Oslo. Unknowing and frightened men, women, children, sick and old are forced on board the awaiting German cargo ship "SS DONAU". The ship leaves with 532 Norwegian Jews onboard; 302 men, 188 women and 42 children. The end station is Auschwitz.