Normal sudoku rules apply. Numbers must not repeat in a killer cage, and the numbers in the cage must sum to the given total, BUT there is exactly one cage in the grid where the condition is broken (either the sum is incorrect, or digits are repeated, or both). It is up to the solver to find out which cage is lying. The purple lines in the grid are incomplete arrows. The digit on one end of the line is the sum of the other digits on the same line.