A drunken call of nature on a generator turns just another night out for Frank into a nightmare. At hospital he's told that tests show he has a heart condition and may not make it to the weekend. With these words ringing in his ears, he sets out to drink and drug himself into a stupor, only to be visited by his younger self and challenged to answer the question: "What is the point of Frank Gallagher?" On one of his regular trips home from university, a little bit of Lip's other life makes an unwelcome appearance in Chatsworth, throwing Mandy into uproar and culminating in a knock-down, drag-out fight in The Jockey with shocking consequences. Elsewhere on the estate, Lillian proves to be quite the madame when she settles on an unconventional way to turn her spare rooms into a little extra cash.
《大城小爱》以都市情感和社会百态为基调，通过展现都市人群的职场、生活、家庭等各个生活层面，以小见大的洞察现代人的都市生活，力争打造出一部现实版的浮世绘。
年仅25岁的李壬曜（曾敬骅 饰）自首并坦承自己就是媒体口中冷血杀害昔日高中同窗的“暴雨杀人魔”。入狱后，他首度答应接受纪录片企划周品瑜（江齐 饰）的采访，没想到她却因此在梦里与李壬曜陷入暧昧缠绵，并逐渐被一名身穿高中制服的神秘少女（李沐 饰）纠缠。梦境与现实的界线逐渐模糊，埋藏在校园岁月里的爱与恨、罪与救赎，也一步步浮现眼前。
神秘的苍梧国中，大将军羲明畏罪自尽，满门被屠，长女羲和（徐轸轸饰）自战场归来，也惨遭暗算。即将成为太子妃的她失去一切，重生为废柴沈千夜。怀着满腔不甘，沈千夜踏上了复仇之路，并与疑似凶手的跋扈小皇叔裴夙（叶盛佳饰）纠葛不休，在调查真相的过程中揭露苍梧国中暗藏的重重秘密，最终寻得光明。
