You're the only person on this earth I can trust

Shosanna:

 I am going to burn down the cinema on Nazi night. 

And if I'm going to burn down the cinema, which I am, 

we both know you're not going to let me do it by myself. 

Because you love me. And I love you. 

And you're the only person on this earth I can trust. 

But that's not all we're going to do. 

Does the filmmaking equipment in the attic still work?

 I know the film camera does. How about the sound recorder?

Marcel: 

Quite well, actually. 

I recorded a new guitarist I met in a cafe last week. 

It works superb. Why do we need filmmaking equipment?

Shosanna: 

Because, Marcel, my sweet, 

we're going to make a film. Just for the Nazis.