A young man is shooting people from a rooftop in downtown Helsinki. An unsuspecting mother is confronted with a horrifying scenario she's powerless to stop. A sister can only watch events unfold from afar. Over the course of a day, one family fractures and each member must examine everything that brought them to this moment. But this crisis goes beyond their small lives; Aslak is not the only boy on a rooftop with a gun today. He is part of an international group set on stopping environmental disaster by killing as many of those they deem responsible as they can. Can a desperate mother reconcile her complicated feelings towards her son and reach him in time to stop a catastrophe?