Generally speaking, following a blueprint is a great idea.

In this one, Ian and Liv talk about an 8-story building that collapsed in Bangladesh in 2013. However, during the building's construction, several distinct deviations from the original blue prints were made, which not only compromised the building's integrity, but would cost the lives of more than a thousand innocent people.

Also, Liv returns with the maturity of a 9-year-old. Ian hates a popular shopping chain.