When evidence of a pipe bomb is found in a suburban home during renovations, Rush reopens the case of a married couple killed in 1981 in what was termed an accidental gas leak explosion at the time.

• 1981年，一对年轻夫妇在爆炸中死亡，被裁定死于意外。廿多年的今天，爆炸现场找到土制炸弹的残骸，把案件带到云丽妮等人面前。