The story opens with Killashandra in debt to the Heptite Guild and desperate to make enough money to escape Ballybran before the seasonal sonic storms. The Guildmaster offers her an opportunity to travel to the music-loving planet of Optheria to install a set of Crystals on their damaged Crystal-powered organ in time for their upcoming Festival, an easy task that will allow Killashandra to clear her debt and escape the storms. Optheria is a pacifist planet alleged to be so perfect that none of its citizens ever desire to travel elsewhere. Upon arrival, Killashandra discovers the organ was deliberately sabotaged. She suspects that the Optherian officials are concealing the full truth about both the organ and the happiness of the Optherian citizens.