As Enterprise enters the orbit of Dekendi III, Dr. Phlox prepares to attend the Interspecies Medical Exchange conference. He's also looking forward to being reunited with one of his wives, Feezal, who will be helping Trip install a neutron microscope onboard. Phlox is pleased to see his wife, but the conference raises a troubling issue — Phlox is the only person onboard Enterprise who knows that T'Pol is suffering from Pa'nar Syndrome, an incurable Vulcan disease. He has been able keep the effects of the disease at bay, but he knows that T'Pol will soon need supplemental medications. Otherwise, she might die. The doctor sees the conference as the perfect opportunity to speak with Vulcan physicians, and learn if they have made any headway with the disease. However, he must keep T'Pol's identity a secret, as the High Command cannot learn of her condition.