In 1992, on a small island in Hong Kong, a boy fell for Yan crazily searched for her by dozens of unbelievable means. Although every 'Yan' he met turned out to be someone else, they did bring life-changing influences to each other. 22 years later, when the story is finally unveiled, middle-aged Yan is deeply moved.

故事由一幢三层唐楼开始，住在顶楼的鳏夫Galen（陈奕迅饰），结识了新搬来住在楼下的一家三口。Terry（Eric Kwok饰）与太太Melena（蔡思韵饰演）表面恩爱，背后却藏着暗涌。Galen的介入，令三人关系出现变化。同一个月光下，有人拥抱有人离异，有人以为故事经已完结，其实一切都是刚刚开始。