Hoping for a fresh start after her recent breakup, the newly single schoolteacher Laura Nielson goes on a date with the recently widowed surgeon, Andrew Earlham.
Laura leads a fierce online attack campaign against Andrew, but someone from her past returns to haunt her, which puts her in danger.
As her biggest fear comes true, Laura has to pull herself together to help one of her students, who becomes entangled with Andrew.
Her search to find answers into Andrew's wife's death leaves Laura even more confused, while tension mounts between Tom and Katy.
A secret in Laura's life threatens to destroy everything she worked for to bring Andrew to justice, which forces her to resort to extreme measures to make Andrew confess.
The conflict between Laura and Andrew reach a violent conclusion, as he asks Luke to be an alibi, while Laura is willing to risk everything to make him pay for what he did.