meredith is a detective working for the LAPD. she's 22 years old, engaged to her high-school sweetheart derek, a surgical resident. they met in their first year of high-school and became best friends. they realised their feelings for eachother soon after and began dating. straight after graduation, derek popped the question and they've been engaged ever since. they're saving up enough money for their wedding. meredith gets a new case where a serial killer is on the loose, out of control. Will she find the murderer?