Marco (Mario Casas) is a young businessman who manages one of the most successful technological companies in the world, ALVA, which has just launched its latest prototype into the market - CYCLONE, an electric car propelled by turbines that turn wind into energy. His friend and classmate Diego works with him, along with the latter's wife, Bárbara, the efficient marketing manager of the company. Eva, a young, ambitious engineer who has a lot to hide, also joins the team, and she will disrupt the balance at work, both emotionally and professionally, between the two business partners. In spite of being a popular guy, Marco, unlike Diego, doesn't have an exciting social life. He is a solitary man, and no one has access to the intimacy of his soul, apart from his psychologist, SARA, on whom he is emotionally dependent. Marco is haunted by a huge number of ghosts from his past and, although he tries hard to scare them away, he only finds comfort in sport and in frequenting a private club. People go there just to get pleasure and give free reign to their wildest erotic fantasies, without fear of falling in love, as everyone has to wear a mask to hide their faces. But everything changes when Marco meets Carol, the new educational psychologist who looks after his brother José, an 18-year-old boy with problems of autism, with whom he has a difficult relationship. With her, he will also meet his worst enemy - himself. Thanks to her, he will discover that it is never too late to love, even if it brings some pain along with it.
1940年的上海，代号“梅花四”的中共地下党员陈家平执行任务时，在险些暴露的紧急关头，与曾经的未婚妻左双桃偶遇。此时的左双桃已经是国民党军统特工，执行刺杀任务失败，也在寻找脱困办法。彼此不知道对方特工身份的两人，凭借当年的默契应对日本人的严密盘查，最终以情侣身份惊险过关。日本人出于对两人伪装情侣的怀疑，随即逼迫两人结婚，左双桃也将计就计进入商行工作。此后
陈家平一边完成任务，一边应对未能消除的身份危机，还要一边试探左双桃的真实身份！斗争日益残酷，最终家平发现双桃是军统特工“红桃五”，左双桃也发现了家平是中共特工“梅花四”。左双桃通过对两党抗日态度与贡献的深入了解，在共产主义信仰的感召下，最终选择和陈家平一起战斗。他们历经考验，在党组织领导下完成艰巨的任务，一起踏上新的征程。
警视厅搜查一课主任姬川玲子（竹内结子 饰）是一个干练果敢、作风彪悍的狮子座女刑警，她与下属菊田和男（西岛秀俊 饰）、石仓保（宇梶刚士 饰）、汤田康平（丸山隆平 饰）、叶山则之（小出惠介 饰）以及编外的井冈博满（生濑胜久 饰）共同组成了破案无数的姬川班。但是其一向靠直觉追查元凶的风格以及争抢好胜的性格，使得玲子在同侪之中饱受非议与苛责。她时常被其他部门称为“大小姐”、“公主”，甚至傲慢的老刑警胜俣健作（武田铁矢 饰）干脆称之为“乡下人”。尽管如此，这名有着不堪回忆的铁血女子在今泉春男系长（高岛政宏 饰）的支持下，率领姬川班一次又一次奔赴罪案现场，与每一桩血案背后的凶手展开斗智斗勇的较量…… 本片根据日本推理作家誉田哲也的同名悬疑小说改编。
