Final plan

Snape’s office

Descriptions of various sinister looking items.

Discover a picture of Lily in the desk-which is locked.

In the room there is a vial containing swirling red wispy smoke. Hermione and Ron wonder what it is.

Harry thinks it bears a resemblance to pensieve thoughts. The only penseive you know of is in Dumbledore’s office.

Dumbledore’s office:

(there is a puzzle to get inside)

Have portraits of the various professors talk to you.

The penseive is locked in a cabinet. Ask one of the portraits who to open it.-opens with a phoenix song.

Fawks flies in (he remains at the portrait of his master). He sings-the cabinet opens.

You dump the red smoke into the Penseive-and various excerpts from “the prince’s tale” play before you.

Afterwords, Harry is horrified. Hermione and Ron have responses as well.

End game.