Berlin. The dead of night. Sixteen-year-old Alissa and her best friend Evelin make their secret Christmas pilgrimage to Alissa's father's grave. In the graveyard, Alissa falls through thick snow into an underground crypt. Searching for a way out, she discovers something else: out of the lid of a small coffin coils a strange black plant. Drawn closer, Alissa sees its roots embedded in a young child's heart. This chance encounter sets off a chain of nightmarish events that throw her life into turmoil. Haunted by angels, stalked by her ex-boyfriend, only with Evelin's help can Alissa reclaim her sanity and discover the truth about her frightening new gift.