This achievement is awarded after completing the following missions in Sequence 6 - Fortune's Disfavor with at least 50% synchronization:
Memory 1 - Into the Shadows
Memory 2 - Honor, Lost and Won
Memory 3 - Bearer of Mixed Tidings
Memory 4 - A Little Errand
Memory 5 - Signs and Symbols, Part III
Memory 6 - The Maiden's Tower
Memory 7 - The Mentor's Return
Memory 8 - Setting Sail
For those of you going for
there are some videos posted below that should help you achieve 100% synchronization in each memory. The videos do not belong to me and I do not take credit for them.