Three years ago, marquee designer Liu Qiao was expelled from the industry due to a product cracking accident, and his lover Ling Xiao left without saying goodbye. Three years later, she switched careers and became a hemming designer for camping leather storage bags, using a 0.3Mm fault-tolerant seam to get back on her feet. The two met again at an outdoor equipment exhibition. He became an independent photographer covered with scars, and she became a paranoid craftsman obsessed with the breathability of leather. Exposure to the sun causes the cortex to shrink and crack, and dew soaks into the stitches to loosen them. Every process conflict asks the same question - if they had left one more point to give in, wouldn't they have been separated? But when the two tried to get closer, they found that they were already used to being alone. They are all healing their wounds in their own way, but this time, no one dares to reach out first. Only by leaving gaps for tolerance in leather goods can they be durable, and by leaving room for compromise in relationships can they be relied upon for a long time. But at the beginning, the two of them only focused on healing themselves, and neither of them left that 0.3 Millimeter for each other.