關(guān)原之戰(zhàn)后35年，日本在變遷的時(shí)代中逐漸恢復(fù)和平。然而，某天突現(xiàn)可怕的怪物——“群兇”，它們襲擊人類，以血肉為食。幕府秘密派遣討伐隊(duì)剿滅群兇，并將相關(guān)地域焚毀掩蓋真相。遠(yuǎn)離紛亂的多胡宿，曾是忍者的凜（木村文乃 飾）隱姓埋名，作為醫(yī)生源三郎（高橋克實(shí) 飾）的助手，與無血緣關(guān)系的養(yǎng)女時(shí)（田牧空 飾）平靜生活。某日，為了獲取治愈時(shí)病癥的藥，凜遠(yuǎn)行至某村，卻發(fā)現(xiàn)那里血跡斑斑、尸骨遍地，恐怖異形的群兇襲來。這一刻，她的悲痛往事浮現(xiàn)腦海。為了保護(hù)如親生女兒般珍貴的時(shí)，凜踏上了一場(chǎng)生死未卜的旅程。與此同時(shí)，一個(gè)仍保有人類意識(shí)，卻變成“半群兇”的男子士郎（田中樹 飾）被世人厭惡幽禁。他苦于不知自身來歷，為了解開身世之謎，踏上了尋找某人的旅程……

　　Hannah Fry uncovers the secrets behind the miraculous technologies of the modern world, revealing the mind-blowing stories behind their invention.
　　Episode 1: Bank Card
　　Hannah Fry takes a look at the bank card. This humble piece of plastic is often taken for granted, but it's the digital key to accessing cash and is packed full of extraordinary technological innovations.
　　Episode 2: Food Delivery App
　　Hannah Fry tucks into the tech behind food delivery apps, which are now used by 24 million people in the UK. Hannah finds out how pizza made us fall in love with the internet.
　　Episode 3: Virtual Assistant
　　Hannah Fry delves into the inner workings of virtual assistants like Amazon's Alexa, Google Assistant and Siri, which are now found in almost half of all UK homes.
　　Episode 4: Electric Car
　　Hannah Fry discovers why innovations in meat packing almost derailed the electric car revolution and how a breakthrough in camcorder batteries led to Elon Musk's electric empire.
　　Episode 5: Fitness Tracker
　　Hannah Fry finds out how 1970s car crashes helped us to count our steps, why high-altitude WWII dog-fights led to a crucial health monitor and how fitness trackers are even being used to catch killers.
　　Episode 6: Trainer
　　Hannah Fry visits eBay's authentication centre, where they are waging war against fake high-value trainers. She also discovers how American breakfast waffles transformed our trainer soles.