The Invisible Knight

When Damian Wayne arrives at Wayne Manor, he's haunted by the ghost of his younger brother, Danny-a tragic casualty of the League's brainwashing. Unseen and protective, Danny reveals himself by saving Tim Drake from one of Damian's attacks, sparking an emotional reckoning between the brothers. As Bruce grapples with the existence and loss of his forgotten son, Danny becomes Tim's unseen guardian, vowing to protect him until Damian abandons his violent instincts. Together, the Wayne family must navigate the shadowy realms between life and death, redemption and vengeance, as Danny's presence brings new threats-and new hope-to Gotham.

Based off of op-sys-chaos post on tumblr