Each of the characters in 'The Palomar Paradox' deals with the Search for Extraterrestrial Intelligence (SETI) in their own way. As in real life, some believe; others don't want you to believe. 'The Palomar Paradox' sees Luper Beauchamps, a brilliant scientist, back in an astronomical observatory searching for signs of extraterrestrial intelligence. He finds himself working with Leila Keiler, a young student recovering from leukaemia, and Karina Lowenhaupt, an experienced astronomer. Other characters include, Trent Foresyth, a senior Pentagon official, and his intern, Rihanna Sørensen. They are charged chiefly with quashing all reports of, and evidence for, extraterrestrial activity.