The Molecular Level

The Molecular Level is a quest and achievement/trophy in Fallout 4.

Quick walkthrough
After entering the Old North Church enter the main room and turn right, the player character will see a lantern painted on the wall in white. Underneath the lantern is a passage leading the player character to a plaque on the wall with wires coming from it. the outer ring can be moved. The code to open this door is as follows. R A I L R O A D. After imputing this the door will open and the player character will be confronted by the leader of the Railroad Desdemona, the player character will then take the chip to be analyzed. After finishing the analysis, return to Virgil, who will tell you to find help and build the device necessary to teleport to the Institute. The player can elicit help from any joined faction to complete this.