Kawamura is a promising young man with a great job and a fiancée whose father owns the company. On the way home from a party on the eve of his wedding day, he falls to a deep bottom of a manhole. Trapped and horrified by incidents one after another, he gets desperate to escape and uses his only reliable tool, a smartphone, to locate himself with GPS, and reach police, friends and even SNS’s anonymous crowd. The clock ticks mercilessly and the morning is nearing. Can the groom get out of the hole intact and get married happily ever after to continue with his successful life?