A story about beginnings, finitude, and the hope of a reunion. The setting is the Sonnenhof, a children's hospice in Berlin. Every year, the butterflies from around the world gather on the butterfly tree in the garden of the Sonnenhof. They share stories of their lives, their transformations, and the mourning rituals from their home countries with the other animals. They speak of hope, love, and the certainty of meeting again. Together, they witness how the Golden Star guides a little soul into another, brighter world. Christel Maria Zwillus, with her child-friendly yet philosophical book "Who Knows Where," helps us confront the big, existential question without fear. Grandma Olga has passed away, little Gustav is sad, but he finds answers. From Penelope, the pink cloud who is his friend, to Tara, the world tree, and many animals.