Dagmar Brink, a young female pianist, commits suicide in her Stockholm apartment. She leaves all her belongings to her next-door neighbours, an author and his wife. Perplexed and curious, they investigate the girl's reasons for taking her life. As they visit Dagmar's friends, acquaintances and former boyfriends, her story unfolds. She stands out as loner, a woman no one could really grasp, always in want of something that nobody she met could make out.