When Jake, a passionate environmental activist, desperate for action on climate change, starts to take drastic action, he sets off a chain of events that threatens everything he holds dear-his freedom, his future, and the woman he loves. As the storm he ignited grows more violent, Jake loses control even over his own life.

Meanwhile, his father Ian-an aging academic and firm climate sceptic-faces a reckoning of his own. With the death of his wife comes the uncovering of long-buried truths, including a cache of unopened letters from his sister lost to war and trauma. Letters that speak of survival, betrayal, and a city under siege.