Kla-Noh and Si-Lun, seekers after secrets, search for the Three Secrets concealed in the Tower of Truth. When they turn their backs on the final secret, dreading the burden that accompanies learning it, they are then accepted as agents by the Wise Ones who rule Shar-Nuhn. This leads them to diverse, strange, and sometimes frightening adventures and at last to more settled and pleasant lives for both.