In 1998 Toronto, a teenage boy and his adopted Inuit sister tour the city, solving crimes and going on misadventures.
This is a general description of time, place and the habits of two characters, it is not a description of specific detail of a single sequence of events i.e a plot.
Who is the main character?
Teenage boy is too generic a description for a logline, what is unique about this boy that differentiates him from the many other teenage boy characters in films and TV shows?
What does the main character want?
Solving crime is to broad a description, which crime specifically? If this is a series then the logline should describe the pilot ep, which crime in the pilot will he have to solve?
Why does the main character need to achieve what they want?
What is the inciting incident that starts the boy off on his journey for this particular plot?
The answers to these questions need to be in the next draft of the logline with plot specific detail.