A man in a white tunic at the center of the scene greets the man in the blue robe with a kiss, distracting him while stabbing him in the side. Although the exact identity of the men is unclear, the scene may depict an Old Testament story about Joab, who committed murder on two separate occasions (2 Kings 3:27, and 2 Kings 20:8-10). These murders are often seen as precursors for the story of Judas betrayal of Christ. This miniature may, therefore, have originally been part of a cycle of typological Passion images in a psalter or book of hours.
The Master of Trinity College Ms. B.11.7 depicts the figures in elaborate costumes with naturalistically textured surfaces, as was characteristic of International style painting. Three of the men wear polished silver armor, and the lower portion of the victim's robe is covered with a dense gold pattern composed of the repeated inscription, "O Mors" (O Death), indicating his fate.