Mo Ye called Eleven in the dead at night when she was sleeping in the room adjacent to Mo Ye. As she had her cell phone with her, she wanted to tell Mo Jue to show Ye Wei the photo before calling back, but there was no news. She instead received a call from an unfamiliar number in the dead of night.
She remembered Mo Ye saying that only he and Mo Jue knew the said number, but what was displayed was not Mo Jue's number. Eleven hesitated for a moment before picking up the call. It was indeed Mo Jue who called her with another number.
To get her to go to Riyadh.
Eleven was concerned about Ye Wei's condition, and Mo Jue also honestly told her that they were headed to Riyadh to look for Bai Ye to patch her up and that he was afraid that Kahn, knowing where Ye Wei was, would come after Ye Wei and harm her. He hence had Eleven go to Riyadh just in case things went south.
Without thinking, she immediately agreed.