Love’s sweet sorrow forms the dramatic storyline for this mystery drama. A free-spirited young woman, Yukari, touches those around her with a zest for life, full of passion. Following her unexplained suicide, her envious younger sister, Reiko, and naive fiancé, Yoshio, form an unlikely alliance with the last person to see her alive, playboy- entertainer Hajime. The three unlikely comrades must join forces to discover the circumstances surroundingYukari’s sudden death. The answers they seek may be found in the many phone numbers stored in her mobile phone. One by one they must interview the people Yukari associated with, to unravel the mystery surrounding her untimely demise. However, the truth may contain more questions than answers. As Yukari’s hidden past is revealed, her secret life promises to shock and surprise those who thought they knew her best.

爱情的酸甜苦辣构成了这个带有神秘色彩的电视剧的主线。一位充满自由精神的年轻女子由佳里，带着对生活的渴望和热情接触着周围的一切。随着她的神秘自杀，她的充满嫉妒心的妹妹玲子、涉世不深的未婚夫良夫和最后一位看到由佳里的玩世不恭的舞者安西新形成同盟关系，开始联手调查由佳里的意外死亡。他们寻找的答案也许就在储藏在她手机里的电话号码上。凡是跟她有过联系的人，他们一一探访，以此来解开她过早死亡之谜。然而，事实上可能其中包含更多的事情，而不是答案。随着由佳里隐藏的过去一一被揭开神秘的面纱时，那些原来认为对由佳里最了解的人们无疑是一个冲击和意外。