A man who has lived an ordinary life as a salaryman becomes a computer criminal, a cracker, and plans to embezzle money from his company in order to reclaim his lost pride. His scheme, driven by revenge and money, leads to a crime that has continued from the past and to another act of vengeance when more money than expected is taken.

An embezzlement exceeding the amount he intended to take awakens a past crime and a cycle of revenge.