What if the person you think you know well turns out to be someone you know nothing about?

Andrea is convinced that she knows her mother Laura well. She knows that she spent her whole life in the coastal town of Belle Isle, that she always wanted peace and family well-being and never hid any secrets.
But everything changes when they go to a restaurant together and Andrea's birthday party turns into a horror. When an unexpected shooting occurs, most of the guests panic, but Laura keeps calm - not only does she protect her daughter, but she kills the attacker without hesitation. Andrea suddenly sees her mother from a different side - is she really the woman who read her bedtime stories? What past is he hiding from her?
However, Laura has become hardened and won't talk to anyone - not the police, not even her daughter. So Andrea has no choice but to search for traces of her mother's past alone. He wants to know the truth, but he has no idea how difficult and risky a journey he is embarking on... But until he discovers his mother's secret and puts the pieces of her lies into a mosaic, there is no future for them.