Back Through The Years (A Mortal Instruments/ Infernal Devices Fanfiction)

In a last minute stand against Sebastian, Clary and Jace run for the safety of the London institute. But who they find there is something that can alter the future of the entire shadow world forever. Jessamine Lovelace haunts the gardens of the London Institute; no one has been able to see her for years. Will and James Herondale, Jem Carstairs and Tessa Grey all could. Now someone entirely unexpected has arrived, a descent of William himself. As Jessamine struggles with trying to break the ward that is keeping her out of her former home, Jace and Clary meet two very surprised people: Jem and Tessa. The shadows of the past are out to get them, how will Clary and Jace’s relationship survive when he’s faced with his great, great grandmother? Find out as the gang go ‘Back Through The Years’