Photoionization of water involves the migration and solvation of electrons, with many transient and highly active intermediates. The process results in a large blue shift in the absorption spectrum, from the THz or gigahertz region to the visible range. While the behavior of low-density quasifree electrons excited by small pump power density has been investigated extensively, we still know little about the transient evolution of photoexcited plasma in liquid water. Valuable insights were recently provided by an international research team in a study published in Advanced Photonics.