Out of the blue, Kirsty receives an email from a stranger titled "Investigating the possible murder of my mother". The author is Sarah, a young woman who was born to Nellie Wilson in a psychiatric hospital in the mid-1980s in Wellington and secretly adopted out.

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Out of the blue, Kirsty receives an email from a stranger titled: "Investigating the possible murder of my mother".

The author is Sarah, a young woman who was born in a psychiatric hospital in the mid-1980s in Wellington. Sarah was adopted out, and only learned the true circumstances of her early life recently, after her birth mother, Nellie, died.

She wants help to look into her past, and to answer the many questions about Nellie.

Why was she in an institution? Did she have another baby? And most of all, was her death an accident, or something worse?

Go to this episode on rnz.co.nz for more details