A 21-year-old psychology student moves to London and takes a caregiving job to support herself financially. She is hired to help a 28-year-old single mother, Riley Nott, a warm and kind law firm employee raising her 6-year-old daughter, Mia. What begins as a practical arrangement slowly turns into something deeper as Y/N becomes part of their daily lives, forming an unexpected emotional bond with both Riley and her daughter while navigating her studies, independence, and growing feelings she never planned for.