away to dinner, Jo investigates the mystery and is accidentally pulled through the mirror into Louisa's bedroom in 1919. This leads to the discovery, by Jo and Louisa, that they can visit each other's times, through the mirror, any time they want to do so – provided that the mirror is situated in exactly the same place and that the mirror's alignment and orientation are identical within the mirror's frame, at corresponding moments in 1919 and 1995. In 1919, Louisa's father is a senior official in the New Zealand Government's Health Department, and their family house is a mansion with servants. Jo, who is the daughter of the Australian school principal at a New Zealand college, lives in a school residential building which happens to be the same house as Louisa's family home, and the girls even have the same bedroom. When Jo and Louisa meet, there is instant rapport between the two girls and they become firm friends, and life changes for them both as they become caught up in a web of intrigue. Following Jo's unexpected journey through the mirror, a hazardous situation occurs during an archaeological dig in a well at Jo's school, when a container they discover in the well is damaged and two of the students working nearby are accidentally sprayed with toxic waste. The affected students become extremely ill, and, when it is discovered that the container has the date 1919 on it, Jo is worried that her friends' sickness is her fault because of going through the mirror to 1919. Back in 1919, Jo asks Louisa to help her find the container so that they can move it, to prevent the later disastrous events happening in 1995. The well is located in the yard of a neighbouring house which is rented by a British visitor to the area, Sir Ivor Creevey-Thorne. Jo and Louisa enter the yard and look down the well, but are disturbed in their actions by Sir Ivor Creevey-Thorne. Their activities are watched by a teenage boy, Nicholas, whom Sir Ivor had brought from Russia to New Zealand, under the guise of caring for the boy until the dangerous situation in Russia abated. Although Nicholas is grateful to Sir Ivor for his help, he is extremely worried about his family, whom he has not heard about for a long time, and is worried about the lack of information he receives