A brutal storm rocks Chicago. Halstead encourages Dr. GraceSong to go against her own findings for the benefit of theirpatient. Asher rushes to the hospital to help Archer's pregnantpatient. Maggie's concern for Ben consumes her.
After a campaign ad targets the Shen family, Mei-Li takesmatters into her own hands. Elsewhere, Delta Security'sinfluence over the city becomes apparent after Ryan makes ashocking discovery at the hospital.
Barry creates a map book to guide him and Iris throughout theirfuture in order to keep her safe, but the results are not whathe expected, and instead, they relive the same day over andover again. Joe has a heart-to-heart with Cecile. A new big badis introduced to Team Flash and friends and foes, old andnew, begin to descend upon Central City.
Nell attempts to restart her life in a new place with a new joband a new roommate. She begins writing obituaries at the localpaper and starts getting life advice from an unlikely source.
Firehouse 51 helps Herrmann put on a school fundraiser.Carver's troubled brother comes to town. A grateful citizen isdetermined to thank Brett and Severide for saving his life.
Sam, Kelly, Naz, and Nathan stage a purple rain take-down ata roller-skating rink. On her way there, Kelly is shaken by aneye-opening altercation with the police.
On Valentine's Day, the Abbott teachers discuss theirrelationships and plans for the holiday. Janine finds out oneof her students has a crush on her and when turning to acolleague for advice, she inadvertently learns a secret aboutanother teacher. Elsewhere, Ava sits in on Jacob's BlackHistory class after receiving a complaint.