22 year old British student Sienna Reagan has just arrived in Seattle to work on an exciting new project with world renowned Neuroscientists. However, Sienna has a wild streak and cannot seem to settle in this hospital. Flirting, sex, medicine, drinking, fallouts and disaster lurk upon Sienna's horizon - and she's here for every last bit. (PS: This story is inaccurate to the timeline and events of Grey's Anatomy at some points.) Content warnings - Sexual references and descriptions, strong language, addiction