Never Ending Love

Valentine and Jonathan Morgenstern are dead. Clary stopped Valentine from using the Angel Raziel's wish to destroy the Downworld and with it her older sister. But things are only ever calm before the storm. Val and Jace are suffering from nightmares both having dreams of Val's younger twin brother Jonathan.
Magnus and Lucy are back together and Magnus has now lost the title of High Warlock. Simon is marked with the Mark of Cain and none of the Shadowhunters can figure out why.
Valkyrie and Clary have put their differences aside and started helping each other fix their family names while those in Idris still judge Val on her demonic blood.
How does the Queen of Edom find a way to make both Val and Jace suffer for their actions against her son? Which one turns out it be the Owl? Why is Alec being secretive around Val? And do both Clary and Val get tied to Jonathan in Lilith's ritual to bring him back? Which sister will give in to the darkness and which one will fight the bond that Lilith forged between the Morgenstern twins and their Fairchild sister?

Disclaimer: I only own Val and Lucy and the plot lines that you don't recognize. I own none of the dialogue that comes from the show nor do I own the plot that the show follows.