Kanji Takizawa worked diligently at a bank, successfully reaching the position of branch manager. Despite the fact that his conversation with his wife Mariko was dwindling and there was a growing distance between his young unmarried daughter, Misaki, he had come to accept his peaceful life. One day, Kanji gets loaned out to a client company for an unjustifiable reason. Shocked, Kanji lies to his family that he was going on a business trip to Switzerland, where he meets and finds a kindred spirit in Shiori Meguro. Meanwhile, Mariko suspects that her husband may be having an affair, and finds herself falling in forbidden love with her daughter’s fiancé, Haruki Hino.
原作は、弘兼憲史による同名漫画。短編オムニバス形式である原作の第1集「不惑の星」をベースに、人生の折り返し地点を通り過ぎた男女3人が図らずも落ちてしまった恋と葛藤するさまを描く。主人公のエリート銀行員を佐々木蔵之介、献身的な妻を中山美穂、主人公が恋に落ちる運命の女性を黒木瞳が演じる。
“無法抗爭的命運的戀愛…三人編織出立於人生歧路的男女間令人感傷的愛情故事——”
主人公瀧沢完治在銀行工作，工作認真努力。和妻子瀧沢真璃子最近對話變少，和女兒也有所疏遠，但他也接受了如此平穩的家庭生活。但某日被毫無道理地降職左遷，使他對自己的工作產生了極大的困惑。出現在他面前的是一張雪山的海報。他以出差為名，一個人去了瑞士。在瑞士的風雪中，他看到了一位日本女性——目黒栞，知性、有品位的她也是一人前來旅行。大雪裹山，月照山頭的夜晚，兩人是旁人未曾想的投機…
另一方面，真璃子懷疑丈夫出軌卻又未問出口，這樣的她，竟對女兒的未婚夫陷入了戀愛…
