I saw the first series (which was good and guessed who killed his wife) but no need to watch it before this one as different stories
A teacher Sally was accused of having an affair and killing a student schoolboy 16yr Matty Taylor
Sally always said she was innocent but went to prison for 5yrs
Now she is out and trying to restart her life , but her husband Sam filed for divorce and has a new partner and getting married
Can only assume new evidence comes to light hence her freedom, but the real killer still needs to be found ........
I really liked the first series so hope this will be good