Time Twisted

When the Infernal Devices Cast uncovers a never-before seen rune, it leads them to the future, where they meet the Mortal Instruments Cast. Everything seems to be going great, until problems and people from the past follow them through time into the present. Not to mention that Jem and Jessamine have found something to tether them to at time that is not their own. Will new additions to the main ensemble help defeat the Pandemonium Club and find the missing Downworld leaders? Will the characters from the past remain in the present?