Arkham Horror LCG: Threads of Fate Mythos Pack

Arkham Horror LCG: Threads of Fate Exp. - Rules of Play says:

Threads of Fate is the first Mythos Pack in "The Forgotten Age" cycle for Arkham Horror: The Card Game. This new scenario throws you into the investigation like never before with three separate Act decks that are each in play simultaneously. With few leads and a limited amount of time before the trail runs cold, you must weigh your evidence to decide which leads to follow and which to ignore. Your choices will permanently shape your adventure throughout "The Forgotten Age" cycle, so you must choose wisely.