An investigation into Lewy body disease, a little-known neurodegenerative disorder often mistaken for Alzheimer's or Parkinson's, which delays its diagnosis and treatment. The symptoms are numerous: cognitive and motor impairments, sleep disorders, hallucinations, and anxiety take a heavy toll on patients' lives.Early diagnosis is crucial as some inappropriate treatments can make matters worse. For now, the only solution is tailor-made support for at-risk seniors and backing from loved ones, who play an essential role in helping patients with their daily lives.