Company employee Song Yan brings in an 18-yuan group meal, pointing directly to the four-yuan price difference over the original 22-yuan meal standard. Everyone doubts Cheng Yu, who has collected meal fees for a long time, of embezzling the extra money. The old supplier is replaced, yet the new group meal hides commercial calculations; meal shortages and information leaks happen one after another. A financial audit clears Cheng Yu's name. Only then does everyone understand that the convenience they have enjoyed all along was nothing more than Cheng Yu silently shouldering all the tedious work—and there is a real price behind every seemingly cheaper deal.