Sua (Chantavit Dhnasevi) and Jib (Preechaya Pongthananikorn) are like any other couple in a relationship conforming with the struggles. They are working in the same bank company which has the strict policy of “No Fraternization”. Because of the strict rule, they have kept their relationship secret for the past 5 years.
You might be wondering why ATM? Well, due to a new software upgrade, customers get double amount of money when they get the cash from it. The story develops when Sua and Jib must find those customers who withdraw twice and get the money back. The one who can do the job first will continue working in their company and the other one has to resign.