Drive over to the waypoint at Vinewood and meet up with Marnie in a secluded alleyway. For this mission, she tasks Michael with buying the Epsilon robes and then wearing them for TEN consecutive days.


After the meeting, pull out the phone and click on the Epsilon link from Marnie's email and purchase the Epsilon robes for a whopping $25,000 to complete the mission. From there, it will take 24 in-game hours to receive the clothes in Mike's closet via a confirmation email.


Once they arrive, don the garbs. The in-game loading screen (when you boot up the game) will indicate how many days you've worn the robes. After ten in-game days, the next Epsilon mission unlocks.