Marine, a young 21-year-old student, learns that she has multiple sclerosis, an incurable autoimmune disease. The shock of the announcement, the urgency of the situation and the need to make a decision about the treatment to follow, push her to find a solution within herself... She decides to go on a long initiatory trip to three countries: New Zealand to rediscover her body, Burma to calm her mind and Mongolia to reconnect with her soul. Through unforgettable experiences, Marine goes to meet herself and find a new balance with this sclerosis she calls "Rosy".