The presence of Maynard James Keenan, frontman for Art Metal bands Tool and A Perfect Circle, is no doubt the only reason for the existence of 'Blood Into Wine,' a documentary that looks at his deepening interest in the art of winemaking. Keenan is a notoriously private guy, thus his involvement is both a blessing (gives it a higher profile) and a curse (he's not the most charismatic interviewee). Grade: C-.
