Maggie tries to get used to Grey Sloan Memorial Hospital, and learns the difficulty of connecting with others. Jo, trying to win over Maggie, tells her about Alex’s dilemma involving Dr. Oliver Lebackes’ private practice and his seat on the board. Maggie discloses this information during surgery with the two, which results in Alex being fired from the private practice. Maggie finds herself beginning a friendship in Amelia and finds out that Meredith isn’t so bad to know. She expresses interest in Bailey's genome mapping project, and she uses it and Cristina's research with the McNeil family to solve their family's case; the children's cardiomyopathy was caused by a gene mutation. After an extended argument, Callie decides that Arizona should do the fetal surgery fellowship and that they would work it out with having a second child. Due to her conversation with Amelia, Maggie tells Meredith that Ellis Grey is her mother, too. Meredith doesn’t believe her however, saying that at five years old she would have known if her mother was pregnant.