One item you can pick up after being able to unlock your bedroom door is Lucy's password. You can then investigate her e-mails, which entail a short secondary story line. After you complete the last Memory Block, go back outside your room. Go to Lucy's computer. In "Deleted Items" is an e-mail which entails her talking to someone about a rescue, then the last reply comes back as:

WondEr Why It is everyone Laughs at you?
i'll Let you guess. let's just say she's
proBably gEtTing it bigger and better from
someone else tHat isn't you. how can you
hope to compEte? REst asSured there are
sOme gOod ways. click the liNk to see!

Removing the capital letters out of the message decodes the message as

WE WILL BE THERE SOON