Casey (Jesse Spencer) and Severide (Taylor Kinney) disagree on a possible arson case in the upcoming episode 5, titled "I Held Her Hand," of the fifth season of the American action drama "Chicago Fire."

After the Chicago Fire squad failed to rescue a woman who was trapped inside her burning greystone, Casey and Severide end up in a conflict as they are trying to figure out if the husband has something to do with the incident. The case they could be facing is a potential arson.

Meanwhile, Hermann (David Eigenberg) is tasked to hunt down a mystery tagger that continuously targets their firehouse. Then, someone decides to visit Boden (Eamonn Walker). Dawson (Monica Raymund) and Brett (Kara Kilmer), on the other hand, respond to a teenage boy who got injured in the midst of his homecoming proposal. The episode will also see "Chicago P.D." star Amy Morton for a guest starring role.

The promo trailer for the upcoming "Chicago Fire" season 5 episode "I Held Her Hand" shows the squad responding to the fire of a suspicious greystone place, which ends the life of a woman. However, someone steps out and accuses the husband of the woman to be responsible for the fire.

Casey suspects that the husband may be the one who started the fire because he found charcoal traces inside the house. However, Severide argues that the man who was willing to risk his life just to save his wife would possibly not commit arson. Despite Severide's opinion, Casey insists that he proves him wrong.

Meanwhile, the previous episode, titled "Nobody Else Is Dying Today," saw Casey thrown into an extreme situation where he had to save both a father and daughter from a dangerous acid spill. Dawson and Brett, on the other hand, had to respond to an elderly woman.

"Chicago Fire" season 5 airs Tuesdays at 10 p.m. on NBC.