Unlocked after visiting Chicago for the first time. Upon returning to Upper West Side, Garland Detective Agency, Johnny runs into Lenny who tells him about a mysterious client named "Tinkerbell". Tinkerbell has set up a riddle to test Johnny's skills as a detective. A 4x4 grid appears with a numbers on the outline and some numbers on the inside. The objective is to find the numbers for A and B. The totals on the right and bottom side of the grid are the sums of the numbers within, and the numbers 1-9 can only be used once. It's a farily simple addition.