Walter, a normally rigorous and calm scientist, suddenly discovered an anomaly in the laboratory one night - a discrepancy in the amount of drugs.He immediately found his lab partner Jesse, but Jesse firmly stated that he had no knowledge of all this.This sudden change made Walter very confused. He suspected whether someone was secretly operating in the laboratory, and that seemingly harmless fly seemed to have become the key to the mystery.

Determined to find out the truth, Walter begins a frantic search for the fly.The laboratory instruments were knocked over one by one by him, and he vowed to catch this fly and solve all the mysteries.Jesse was a little confused when he saw this scene, but he still chose to stay and help Walter.However, things didn't go as they expected, and Jesse did more harm than good, making Walter even more anxious.

In anger, Walter drove Jesse out of the laboratory and decided to face this problem alone.Although Jesse left, her heart was full of worry and confusion.She decided to turn off the electricity in the laboratory and go out to buy fly sticky boards, hoping to help Walter solve this problem.

However, things are not that simple.When Jesse returns to the lab with the fly sticky board, she finds Walter exhausted but still determined to catch the fly.Seeing this scene, Jesse was so distressed that she decided to put sleeping pills in Walter's coffee to give him a temporary rest.

After Walter drank the coffee, he fell asleep soon.Jesse took the opportunity to continue looking for the fly, hoping to find some clues.In the process of searching, she overheard the conversation between Walter and Jane's father in the bar, and learned that the reason why Walter was so persistent was for his family.This moved Jesse deeply and she decided to help Walter solve all the mysteries.

After some efforts, Jesse finally caught the fly.She looked at the fly in her hand, feeling filled with a sense of accomplishment.At this time, Walter had fallen into a deep sleep due to the effect of sleeping pills.Jesse gently laid him on the bed and covered him with the quilt.

However, when Walt wakes up and discovers a discrepancy in the amount of drugs in the lab, he immediately realizes that it was Jesse's doing.He finds Jesse and warns her not to continue.But Jesse firmly denied her crime and said she did not take any drugs.Faced with Jesse's denial, Walter felt very helpless, knowing that he was powerless to do anything about it.