Skye Hopps, a high school student who secretly works as a spy, lost her mother as a child; her father remarried a woman with two mean daughters. Despite her complicated family life, she has a partner—who is also her boyfriend—and friends like Spike Silver, Rooney Bloom, and Myla Ji-wa, but she has discovered her true calling: espionage. In her personal notebook, she logs suspicious activities and jots down observations about almost everyone she meets. It all seems harmless until, one day, someone discovers the notebook and reveals her critical opinions about her classmates. Suddenly, even her closest friends turn against her, and Skye is determined to exact revenge.