Five part mystery thriller which follows Ivy Moxham on the day she escapes from the cellar that has been her prison for the last 13 years. It's the day she'll return to her home, to her family, to her life. It's the day that is only the beginning. Thirteen is an emotional roller-coaster that explores how to pick up the threads of a life half-lived and how to survive as a family under the greatest pressure: how to feel again, chance love again. It is a psychological drama about who to trust when you can't even trust yourself.