The Last Dark Instruments

When James, Cordelia and Lucie find themselves in Los Angeles, The local shadowhunters are curious at the disturbance, upon further inspection of the situation they call their buddie in New York, when Magnus flips out and the New Yorkers are still puzzled, they call Tessa and Jem, who are following their own lead on two young male shadowhunters that were spotted in london- one dark haired the other with silver hair.