By all accounts Kevin Parsons is leading a virtuous life. But like all people, Kevin has his secrets. And someone wants them revealed. While driving home from graduate school, Kevin receives a call from a deluded stranger who calls himself Slater. Slater demands that Kevin confess his sin in the next three minutes or the car he's driving will be blown to pieces. With the threat, he offers a riddle: What falls but never breaks, what breaks but never falls?