In a hook-up, Hardy ended up getting the woman pregnant but didn't stay to find out, and you were the result of that. You were his copy, acquiring bad temper and ignorance, and this caused an argument between you and your mother.

She kicked you out of the house and sent you to Broadchurch, where your father now worked. You go to the police department and talk to the receptionist, she lets you in and now you just need to find your father...