He may be a lone guy with an acoustic guitar, but Chris Otepka gives fans a lot of ideas to unpack. Even his backstory necessitates some explanation: The lead singer of a criminally underheralded band, Troubled Hubble, Otepka now performs solo and unplugged as The Heligoats — a strange name for a guy strumming a guitar, but oddly befitting someone who stuffs his songs with so many sideways ideas and observations.