Mordecai and Rigby try to write a hit song. When their coworkers doubt it, the duo try to prove themselves by showing their song to Really Cool Records. When that fails, Mordecai and Rigby propose a variant of their song as an idea for a ringtone but they keep it to themselves.
After Balthazar changes history and keeps the Titanic from sinking, Fate intervenes and begins killing those that would have died on the ship. Castiel tells Sam and Dean that Fate is very upset with the two of them and the only way they can stay alive is to kill her.