The case attached to the dead body, paired with working alongside new recruit Wei-shan, provides a much-needed distraction but also adds to DC Wu's trauma.
Instead, it focuses on the trauma from working a kidnapping/serial case and how each interaction triggers and could weigh heavily on DC Wu's mental state.
Those who want a decent mystery that doesn't try to have a last-minute, insulting twist and those who enjoy watching mysteries worked by cops with personal struggles.