The familiar yet annoying sound of the alarm clock was what woke Jay up that chilly November morning. He tossed and turned and looked at the time on his phone; 6:15. Him and Erin had to drop their 4 year old son, Hayden, at school at 7:30 and be at work at 8.

"Babe." Jay said as he tried to wake his wife. "It's 6:15, we gotta get ready."

Erin groaned as she stretched her tired arms. Neither of the two had got much sleep last night thanks to their son. Recently he had not been feeling well and had refused to eat for the past week. The couple grew increasingly worried last night when he began throwing up so they scheduled an appointment for the following day.

Erin slowly got out of bed and slipped on one of Jay's Blackhawks T-shirts before she headed for the bathroom.

"Can you go wake Hayden up and get him ready?" Erin asked as she stood in the doorway of the bathroom.

"Yeah." Jay replied, his voice still raspy from just waking up.

Jay walked into his son's room and found him crying in his sleep. Jay's heart broke at the sight of his son in pain. He carefully kneeled next to the young boy and began stroking his soft brown hair.

"Hey buddy, it's time to get ready for school. Mommy is in the shower, but she'll be done in just a bit."

"Daddy, my tummy hurts." Hayden said with tears in his eyes.

Jay carefully picked Hayden up, carried him to the couch, and turned on his favorite cartoon; Daniel Tiger's Neighborhood.

"I'm going to go get you something that will make your tummy better, okay?"

"Okay." Hayden replied weakly.

Jay walked to the bathroom and started looking through the medicine cabinet.

"Hey Er, what should I give Hayden for his tummy? He woke up complaining that it hurt."

"Um, try giving him some Tylenol. It's worked in the past for him." Erin replied from the shower.

Jay opened the small red and white bottle and took out the right dose before putting the cap back on.

"Alright, thanks." He said before leaving the bathroom. Jay then went and got a glass of water from the kitchen and returned to his sick son.

"Okay Hay, this is gonna make you feel better." Jay said as he handed the small white pill to his son. "Do you remember how we taught you to take these?"

The small boy nodded and swallowed the pill before laying back down and watching his cartoon.

"I'm going to go get you an outfit and then mommy will make breakfast."

Jay went to the Hayden's room and took out a pair of tan shorts, a blue T-shirt with a green dinosaur on it, and white socks from the dresser.

"Okay buddy, it's time to get ready. Can you sit up for me?" Jay asked as he returned to the living room.

The 4 year old slowly sat up and took off his "Tom and Jerry" pajamas. Looking at his son in just his underwear, Jay noticed how much thinner he was and how much paler he was. "Thankfully we have an appointment tomorrow." Jay thought to himself.

Once Jay finished getting Hayden ready and Erin finished her shower, Jay finally begun getting himself ready.

"What do you want for breakfast baby?" Erin asked as she walked to the kitchen.

"I'm not hungry." Hayden replied weakly.

"You have to eat something if you want to grow big and strong." Erin said, trying to get him to eat something. "How about eggs?"

Even though he didn't reply, Erin began cooking scrambled eggs knowing they were his favorite.

10 minutes later, Jay was ready, Erin was trying to force feed Hayden, and Hayden was nearly throwing up.

"Please mamma, I'm not hungry." Hayden pleaded.

"Okay, I'll pack your lunch and a snack for when you get hungry. Promise me you'll try to eat."

"I'll try mamma."

"I know you haven't been feeling well so daddy and I made a doctors appointment for tomorrow so we can figure out what's going on."

The small boy nodded as he slipped on his backpack.

"We better get going or we're going to be late." Jay said, seeing the time was 7:10.

"Okay buddy, let's get in the car. Do you need daddy to carry you?" Erin asked.

Hayden nodded so Jay picked him up. He could tell Hayden was significantly lighter, even with his backpack on. Jay noticed Hayden's blue-green eyes were beginning to fill with tears again. This was extremely unusual because Hayden never cried, even when he fell down the apartment stairs a few months ago and cut his leg so bad that he needed stitches.

"I'm sorry buddy, I wish we could stay home with you, but mommy and daddy have to go catch bad guys." Jay said as he wiped away the tears on his son's cheeks. "Let's go to school, okay? You can go see Lucas and Morgan, and maybe you could color grandpa Hank a picture." Hayden's eyes light up at the mention of Hank's name.

"If I color grandpa a picture, can we go visit him so I can give it to him?" Hayden asked, his tears beginning to dry up.

"I think we can make that happen." Erin said. "But let's get to school so we're not late.

They headed down to the car and everyone was in their usual place; Erin in the driver's seat, Jay in the passenger's seat, and Hayden in the back seat.

15 minutes later, they arrived at Hayden's preschool. Jay walked him in and quickly ran back to the car so they wouldn't be late to work.

"Poor guy, I hate to see him in pain." Erin said as they headed to the precinct. "I really wish we could of stayed home with him."

"I know, me too." Jay agreed.

Jay and Erin arrived at the precinct with 2 minutes to spare. They quickly walked in and greeted Platt before headed upstairs.

"Halstead. Lindsay. Nice of you to join us. We were just about to debrief our next case."

The pair sat at their desks and quickly got lost in their work. The case was pretty simple and they solved it and got their guy by 2:00.

"Great work everybody, now I'll leave you to your paperwork, if you need me I'll be in my office." Voight said before shutting his door.

Everyone was so lost in the mountains of paperwork, that Jay and Erin didn't realize their phones repeatedly buzzing.

Suddenly, a familiar voice broke the silence. "Halstead. Lindsay. There's been a medical emergency involving Hayden at his preschool." Platt said, clearly worried. "I've got Sylvie on the phone."