72 years old Martha Jellneck lives alone in a small apartment in Hamburg. Since shes hampered in walking, she never leaves her home. Her only contacts to the outside world are the young social worker Thomas and a neighbor boy who walks her dog. When Thomas tells her one day that Franz Laub, another one of his clients, has his birthday, she becomes suspicious that was also her half-brothers name and day of birth - only that he died in WW2...