Out of Time!

From the introduction: The party is tasked by the mage guild to investigate one of their member that had become obsessed with the research of Petros Alerack; his master that had disappeared mysteriously almost a century ago. The party tracks the mage to his master's old sanctum but arrive just in time to see the mage activate some strange magic. Soon, the world shift as the reckless magic has folded time onto itself!