If one of them is dead (on hold)

"Allison can you keep a secret" yes Katherine" but can you keep a secret if one of them is dead. Allison Jennings (Played by Sasha Piterse) has to keep a secret but can she keep it if the person whom she promised it to is dead. Katherine (played by Crystal Reed) was Allison's best friend and Zayn Malik's girlfriend but she was covered with secrets and lies will she ruin Allison's life forever or give her a blessing