Osiris has received a distress call from the Vex network sent by Saint-14, and you need to figure out how to help him.
Open the gateway
Your first task is to install the transponders. To do this, head to Nessus and visit six different points. Once in each of them, stand in the small white circle to put the transponder.
Below you will find a map of each point. Only the location of the transponder is not marked in the lower left corner, southwest of the Pools.
The most difficult point is located at the top, in the Water Room. To get there, use the teleporter next to the large golden ship.
Ghost of Saint-14
Transponders have pinpointed the Ghost of Saint-14. To find it use our management.
Take it home
Now that you have the Ghost of Saint-14, you can return it to Osiris.
Charging the Sundial
Now you need to use the Sundial, but it needs a recharge for that. Kill 25 Guardians in Crucible or Gambit, get 25 kills with your superpowers and collect 25 Orbs of Light.
Go back to the clock
When you have enough energy to charge the Sundial, return to it on Mercury and charge it.
Back to the past
After receiving a new task, approach the Sundial to the right of Osiris and travel back in time. You will begin the mission Corridors in Time 2.
End of the journey
After this step, you will find yourself in orbit. You need to return to Osiris on Mercury and talk to him about saving Saint-14.