As Lauren and Michael Casey bicycle through Miami's Coconut Grove, Michael races off while his wife is preoccupied with changing gears. When she gets up to speed, Michael is out of sight. She anticipates he will surprise her by coming up from behind and tapping her on the shoulder. It doesn't happen. After a fruitless search, she reports him missing. Later that evening, she is mortified when she learns he was murdered. After the tragedy is broadcast, she is contacted by a man who claims to be a dead ringer for her husband and believes the bullet had been intended for him. Lauren then teams up with him to solve her husband's murder and finds her own life is in danger.