Sixteen-year-old Kara Nightingale is unpopular, awkward and positively ordinary. That is until one day she is struck by a bus and dies... Within moments, her life changes from ordinary to extraordinary when she wakes up in a mysterious world with a new career—as a rookie for the Guardian Angel Legion. Love is forbidden among the guardians. And when gorgeous David arrives as her training officer, Kara finds herself torn between her feelings for David and her job. As she struggles to understand the responsibilities of her new job, Kara realizes she is different from the other angels and discovers a mysterious inner power. Determined to embrace her hidden talents, Kara undertakes a desperate mission under the growing shadow of an ancient evil and save the mortal world—if she can survive.