Emma suffers from 'Siderodromophilia'. She cannot get aroused unless she is on or around moving trains in Chicago. Her lover, Jake, is desperately trying to normalize her through creative intimacy, but she keeps pulling him into her tortured world.
In an attempt to get his wife interested in sex, a man dresses up as Frank-N-Furter a few weeks after the arrival of their first child. This leads to a revealing conversation about their relationship - and a rather impressive song and dance number.