Jace knows Sian is up to something. He suspects her sleepover is just a cover for her to get up to no good, so he stakes out her driveway to catch her at it. He'd no sooner pulled her out of her car when she did indeed try to sneak out of the house when there is an explosion. Track is miles away from home when he gets the sense that something is wrong and puts a call out to Valerie and Jace. While he's on the phone with Val he hears the explosion in the background and then the phone goes dead. Now he might have to jeopardize the secret he's been keeping from everyone to get back to her and the others.