The Oracle tasked her to go to seek for potentials in the Digi-Caribbean with Lena and Rollins. While she was swimming, her daughters intended to make a birthday surprise to her, and Lisa hacked into the Matrix to meet her.
However this act made the Machines track the Calappidae. As Maggie saw Lisa before her, and Lena and Rollins dead, she realized that her moment would come too.
She gave Lisa a shell she collected some time before, and died by a Sentinel, in front of Lisa.