為咗參加朋友嘅結婚典禮…喺盂蘭盆節放假期間返鄉下嘅我,再次同埋細個就一直憧憬嘅青梅竹馬・愛重逢。雖然我哋都結咗婚,完全變成大人,但係愛嘅笑容依家都仲係令我心跳加速。細個嗰陣,我哋兩個仔定咗嘅秘密暗號…偷偷摸摸咁潛入愛嘅屋企,喺深夜睇煙花…。而家變咗大人,我哋好似嗰陣時一樣,喺夜空下睇煙花,但係單靠煙花就唔能夠抑制住…