Energy underpins all our lives. We expect hot water and lighting at the flick of a switch, underestimating the complex series of events that makes these things possible. But there is a vast global network of power stations, gas pipelines, transmission cables, and engineers, quietly working behind the scenes. Engineer Yasmin Ali takes us on a deeply personal journey around the world to show us the entire picture, from underwater pipelines being welded together, across acres of solar panels shimmering in the desert, to the colossal ships moving natural gas around the oceans.