Despite devastating diagnosis and exhausting treatments, Charlotte Link never loses hope for her sister's recovery. This persistent optimism becomes the driving force of their actions and provides strength to both sisters in their fight against the disease.

The book focuses on the deep love between two sisters, describing their shared past, unshakeable bond, and unconditional support for each other. The fear of losing a beloved sister is ever-present throughout the narrative.

Link openly criticizes aspects of the German healthcare system, including impersonal hospital environments, overworked nursing staff, and questionable attitudes of some doctors, while also acknowledging the dedication of many healthcare workers.