一场神秘事故导致17岁的凯登丝失去了记忆。一年后，她回到玛莎葡萄园附近的比奇伍德岛，寻找真相。显赫的辛克莱尔家族三代人齐聚他们专属的夏日天堂，却没人愿提起那场意外。无论是她儿时最亲密的“说谎家”，还是她的初恋盖特，所有人都保持沉默，迫使她亲自揭开真相。

在一个吸血鬼学院，两个年轻女人的友谊超越了她们的阶层，因为她们准备完成学业，进入吸血鬼社会。一个是强大的皇室成员，另一个是半吸血鬼的守护者，被训练来抵御野蛮的“返魂尸”。

改编自Amy Chozick的畅销书《Chasing Hillary》，讲述四名女记者在一场候选人充满争议的混乱大选中，找到了友情、爱情与各种丑闻。

CW已续订《初代吸血鬼》第五季。

官方宣布第4季

As season three begins, Hope has risked everything to pull her friends back from the brink of a monstrous prophecy that threatened them. But when a heartbreaking loss shatters her whole world, Hope Mikaelson will be forced to fight fate itself.

CW的《吸血鬼日记 The Vampire Diaries》及《吸血鬼始祖 The Originals》共同衍生剧《吸血鬼后裔 Legacies》背景设置在Salvatore学校里，17岁的Hope Mikaelson（Danielle Rose Russell饰，狼人﹑吸血鬼 ﹑女巫三重混血种）﹑Alaric Saltzman的双胞胎Lizzie﹑Josie，及其他拥有超自然血统的的年青人在此既可能建立起自我，亦可能被冲动所蒙蔽。所以他们究竟会成为英雄，还是如血统本质下成为反派？而他们的行为都在校长Alaric Saltzman（Matthew Davis饰）的监督之下。

Season three opens the door to learn more about Klaus and the Original Family as his motives for wanting Stefan on his side are finally revealed. As Stefan sinks deeper into the dark side, Damon and Elena struggle with the guilt of their growing bond, even as they work together to bring Stefan back from the edge.

This season, Katherine's appearance in Mystic Falls will throw a wrench into the love triangle between Stefan, Elena and Damon, and the other residents of Mystic Falls must choose sides as they fall victim to a new breed of danger. New and unexpected friendships will be forged, allies will become enemies and hearts will be broken. Plus, Stefan and Damon will be forced to face a villain more evil and diabolical than they thought possible.

Life hasn't been the same for Elena since the tragic death of her parents, but she tries to pick up the pieces and provide support for her troubled younger brother, Jeremy. On her first day back at Mystic Falls High School, Elena meets the mysterious new guy, Stefan, and the two seeming lost souls form an instant connection. What Elena doesn't know, however, is that Stefan is a vampire, constantly resisting the urge to taste her blood. But Stefan, it seems, has a greater evil to deal with when his dangerous older brother, Damon, shows up to wreak havoc on the town of Mystic Falls — and claim Elena for himself.

The fourth season starts off with everything in transition. Elena faces her worst nightmare as she awakens from her deadly accident to find she must now endure the terrifying change of becoming a vampire — or face certain death. Stefan and Damon are torn even further apart over how to help Elena adjust to a life she never wanted, and everyone must cope with the chaos created after the vampires and their supporters were outed to the town council and local leaders. Despite everything, as Elena and her friends enter into the final stretch of high school before graduation sends them on different paths, they feel the bond to their home town of Mystic Falls take on a deeper meaning when a new mysterious villain is introduced who seems intent on destroying it.