How is Mark's Transvice taken from him in Chapter 59? What does Mark do next?

Mark lunges to keep track of Deedee, but loses her in the confusion. Mark is hit in the back of the head and falls to the ground, where the Transvice is taken. He can see Deedee being carried upstairs, pursued by Trina, while Alec battles six others. Mark resolves to go after Trina and Deedee first.