The Dear Hunter's Acts I-V albums follow one whole concept:

Act I: The Lake South, the River North (2006)

Act II: The Meaning of, & All Things Regarding Ms. Leading (2007)

Act III: Life and Death (2009)

Act IV: Rebirth in Reprise (2015)

Act V: Hymns With the Devil in Confessional (2016)

Full explanation & overview of the concept - http://worldprognation.com/the-dear-hunter-full-story-explanation-and-overview-part-i/

There's supposed to be an Act VI, but they're taking forever with it.