西雅图格雷斯医院迎来新一批实习生，梅雷迪斯·格雷（艾伦·旁派 Ellen Pompeo 饰）、克里斯蒂娜·杨（吴珊卓 Sandra Oh 饰）、伊泽贝尔·斯蒂文（凯瑟琳·海格尔 Katherine Heigl 饰）、乔治·梅利（T·R·奈特 T.R. Knight 饰） 、亚里克斯·卡莱（贾斯汀·钱伯斯 Justin Chambers 饰），五个医学院好友同期毕业，需要以良好表现争夺住院医师正式席位。进入医院伊始，梅雷迪斯崩溃地发现前晚在酒吧和她发生一夜情的男人，竟然是神经外科医生德立克·舍伯（帕特里克·德姆西 Patrick Dempsey 饰），两人纠葛就此开始；克里斯蒂娜吸引了胸外科医师普雷斯顿·伯克的注意，因为他们同样高傲和野心勃勃；乔治悄悄爱着梅雷迪斯；美丽的伊泽贝尔第一时间掀起流言，一年的实习期注定充满高密度的压力竞争与荷尔蒙……

格蕾成功生娃，韦伯触电待救，胖C发现AC出轨情感危机，杨和欧文感情不甚乐观，四月继续纠结小黑。第二代实习医生遇到重大考验，生离死别，真情初现……

Welcome to 97-hour weeks. Welcome to life and death decisions. Welcome to a constant tsunami of bodily fluids. Welcome to earning less than the hospital parking meter. Wave goodbye to your friends and relationships. Welcome to the life of a junior doctor. Scribbled in secret after endless days, sleepless nights and missed weekends, comedian and former junior doctor Adam Kay’s This Is Going to Hurt provides a no-holds-barred account of his time on the NHS front line (with a foreword attempting to explain the National Health Service to a non-UK audience). Hilarious, horrifying and heartbreaking by turns, this is everything you wanted to know—and more than a few things you didn't—about life on and off the hospital ward. And yes, it may leave a scar.