Prue Halliwell stumbled upon Aviva's diary after a series of events led Prue to visit Aviva's aunt Jackie in the hospital. Jackie told Prue about strange occurrences involving Aviva and how she would hear Aviva talking to someone in her room when she was supposedly alone. Prue asked Jackie if she could go to her apartment to collect a few of Aviva's things because she was staying with the Halliwell's while Jackie was in the hospital. At the apartment, Prue found the diary which revealed Aviva was being told to pose as a friend of the sisters in an attempt to take over the "Halliwell Coven".