Thousands of important experiments are conducted daily on Rainbow, the most important of which is a new method of spatial travel – ‘Null-T.’ But one day, the experiment goes awry, resulting in a gigantic, devastating Wave, sweeping all life from the planet's surface. The ship ‘Tariel’ can only take a limited number of passengers. Who must be rescued first? The collection also features the novella ‘Escape Attempt,’ as well as ‘Distant Rainbow,’ part of the conventional ‘midday’ cycle.