A seahorse swims upright in the water and can’t sink. Part of the human brain is named after it, the hippocampus, which is Latin for seahorse. This is where memories are stored. When Hanan, a young Yazidi woman, crosses the Mediterranean with her family in a small rubber dinghy, she can’t swim. The blue water and her fear of drowning are indelibly etched in her memory. To overcome her fears, she learns to swim. But in the swimming pool, she is still plagued by dark images …