 The Varro, a xenophobic, space-dwelling species reluctantly accepts Voyager s assistance with extensive repairs to their ship and Janeway hopes to learn more about surviving long voyages from them. But an unexpected problem arises when Harry becomes intimately involved with Tahl, an engineering assistant he is working with to aid repairs. When he begins glowing - literally - Tahl reveals when her species mate they become biochemically linked for life. Meanwhile, Tuvok finds a stowaway on board; the man claims a resistance is growing on the Varro ship.