Melissa works as a mobile geriatric nurse and loves her job. Her old patients have all grown close to her heart, and she always says goodbye to them in a fitting manner. At a funeral of her loved ones at the Melaten cemetery in Cologne, Melissa meets the quirky gardener Heinrich. She is fascinated by its wonderful flower beds. She particularly notices the copper-red hyacinths. His favorite flowers. He plants them on the graves of people who did not die of natural causes. Melissa doesn't believe a word he says. However, when Heinrich tells her something about the deceased that he cannot know, Melissa decides to get to the bottom of the matter.