Captain Kathryn Janeway and Tuvok leave the ship as official guests of a nearby colony; Neelix is assigned the task of escorting the colony's guest, Tomin, aboard the ship. Neelix is surprised that Tomin is quick to break the strict regime set by his people to sample everything from food to entertainment that Voyager has to offer. The crew finds that Tomin's physiology is unable to handle the synthahol used in drinks and becomes highly intoxicated on the night prior to the return of his elder, on the night a shipwide reception is due to take place for him. Neelix works with The Doctor and Seven of Nine to use Seven's Borg nano-probes to process the synthahol. Tomin, though still unsteady on his feet, is collected enough to greet his elder, Janeway, and Tuvok with Neelix's help in the same regiment he initially arrived with. To their surprise, the elder thought that Tomin would have taken time to sample what Voyager had, in moderation. Neelix is commended for his duties.
Meanwhile, after Tom Paris and B'Elanna Torres become upset after discovering Seven observing and documenting their romantic interactions, The Doctor offers to help teach Seven on human mating rituals through an elaborate educational course, including such elements as singing. Seven works her way up from interactions with holograph men and eventually ends up in a date with another human crewman. When they attempt to dance, Seven's strength strains the crewmen's arms, prematurely ending the date. Seven comes to believe she is unsuitable for dating. The Doctor has become somewhat smitten with her, and on a bet with Paris, offers to take her to Tomin's reception. Seven's behavior is perfectly appropriate for the event but upon learning of the Doctor's bet, she storms off.
The Doctor, alone, practices wooing Seven in the holodeck, noting to the simulation that the last few dates have been "unforgettable". However, his practice is interrupted by the real Seven. She presents the Doctor with an enhanced tri-corder as a gift for his help, but admits that she believes there is no suitable mate on board, leaving the Doctor despondent, singing George Gershwin's "Someone to Watch Over Me" on piano in one of the training hologram simulations.