After defeating Zoom, Barry was acting impulsive and edgy 'til he mysteriously vanished for months. When he finally reappeared, something is different with him. Can the team figure what's wrong and pierce the mystery of his disappearance while dealing at the same time with a new threat rising in both Star City and Central City, looking for an old artefact from the legends?

Barry kept his head down in shame as he walked through the station. All of the officers at the CCPD were staring at him, no doubt wondering why he was wearing handcuffs and being pushed forward by Officer Liddell towards the booking area.