A creature from Irish folklore possesses Fi's mom and makes her do weird things, such as using the back corner of a tour bus as a backscratcher and dancing for no apparent reason.
While viewing the ghost lights of Marfa, a mischievous will o' the wisp takes over Jack's body and freezes time leaving Fi to decipher the riddle of his name or the creature will inhabit Jack's body permanently.
At a concert Fi meets a girl forced into entertainment slavery, for a reason. She is a siren, but unlike the evil ones depicted in legends, she just wants to go home and avoid the world.