Archer sends an away team to a habitable, luscious planet for observation. But when a storm occurs, the team begins to experience paranoid delusions.

The crew discovers a new planet with two races, one in desperate need of medical and scientific assistance. In the course of trying to help, Dr. Phlox recalls his own Denobulan past to address the ethical dilemmas that arise in the present.

Archer, Hoshi, Travis, Malcolm and Trip have decidedly different experiences during shore leave on Risa. Meanwhile, on Enterprise, Phlox enters his annual hibernation cycle.