濱海小鎮，貴瑚獨自搬進藝妓奶奶留下的大宅。在親情與愛情裡跌撞，刻進生命裡的傷疤無聲哭號，喚來同樣負傷的男孩「蟲」。男孩瘦骨嶙峋、失語無言，被母親凌遲，卻仍對愛渴望。因愛孤獨，兩人像終於聽見彼此吶喊的鯨魚，尖銳而無助的52赫茲，讓彼此心中的陰霾共鳴震盪，以此相扶。平行的生命因傷痛交錯，浪花匍匐上岸，似也捲來孤獨鯨魚的喊聲，兩個背負傷痛的靈魂能否隨時間重啟新生？

新一代實力演員衫咲花、志尊淳領銜主演。《第八日的蟬》金獎名導成島出再推小說改編大作，細細切開親密關係裡的黑暗與扭曲，曾以為是世界上最孤獨的存在，荒蕪因彼此春暖花開，背負的傷痛隨時光洗刷逐格顯影，在糾結與矛盾中尋覓真正的救贖。娓娓道來的故事，節制卻震撼、深邃而悠遠，以愛為名召喚人心中最深沉的寂寞與無助；又在灼人的血淚中，映照出溫暖光輝。

Right after moving to a small seaside town, Kiko comes across a boy who is abused by his mother. Kiko finds herself in him for being a “52-hertz whale”, a lone whale that can only speak in a high frequency that other whales cannot hear in the vast ocean. Having been saved by an important friend in the past herself, Kiko decides to save this lonesome boy. It turns, however, into an emotional journey that looks back on her own past…