Help! Missing Trinket!

[Viking]

Absolutely loving every minute of this, even the hard stuff, but I am now officially needing help. I've got 19/20 Trinkets and can't see how to get to the room with the last one (although during my browsing I did see people managing to get 21 Trinkets).

It's situated in the top left of the map within or at the edge of the dark blue area, right below the Topsy Turyism screen. I've been all around the edges and can't see a way in, other than finding a way to get outside the bouncy lines. Which I couldn't see.

Help!

[Requiem]

I'll just say it has something to do with the screens "I'm Sorry" and "Please Forgive Me". That's the only clue you'll get outta me!   

[Viking]

Thanks. Vague clues are always better. Makes it seem like I've actually done something. 

[Viking]

Whoo! Thank you!

PS. Terry, you're a git! But I like it. 

[VVVCCC]

You know you could have just watched Let's Plays of it. gnrfan5000 found it.