An Amber Alert sends the team on a race against time to find a newborn infant who was stolen from a local hospital. Meanwhile, Officers Jackson and Chen work their last shift as rookies as Officer Nolan continues on for 30 more days.

When Professor Fiona Ryan's car window is smashed following a series of mysterious notes, Officer Nolan volunteers to guard her house overnight. Meanwhile, Lucy notices that Tim is being much nicer to his new boot than he was with her and she does not like it.