Holed up in a small Normandy town, Louise hides from her ghosts as she looks after grumpy old Theo, the retired lighthouse keeper who shares her passion for ornithology. As she wanders the twisted shores, observing birds and people alike, Louise also keeps track of old Florelle, another broken soul who searches the beaches, seemingly waiting for the crashing waves to return something to her. Observing the locals' reactions to Lambert's return, the heir of a family lost at sea, Louise is intrigued by his past but, at the same time, attracted to him. As their relationship deepens, they start to unravel the web of secrets that have haunted the small village for decades. Together, they struggle to uncover the truth that could set them both free.