"Guess!" Cassie said coming through the door of your room suddenly. You didn't even know your best friend was in Gotham, she must have flown here unexpectedly if she hadn't texted you a hundred times about it. You didn't even have time to respond when she jumped onto your bed. "There's an archaeology exhibit at the Gotham museum, and you have to come with me, you can't say no, you owe me." Cassie says cheerfully, kicking her feet.