This is a story related trophy, and will unlock after you complete the prologue.
This is very linear, but if you really want to know what to do then please read the spoiler.
*** Spoiler - click to reveal ***At the beginning, once you control Shepard, make your way through the Normandy to Joker. After saving him, and putting him in a escape pod, cutscenes will start, and the trophy will unlock shorty after the title.