From the publisher's web page:
In Memory of Day is the second Asylum Pack in the Dreamlands expansion for the Call of Cthulhu Living Card Game. The lost dreamers are drawn deeper into the Dreamlands with each passing day, and the tale of Twila Katherine Price, and those she left behind, continues.
In Memory of Day contains 20 different never-before-seen cards based on the dark mythos of master horror writer H.P. Lovecraft, designed to augment existing decks and add variety to the Call of Cthulhu metagame.
This is not a stand-alone deck; you must have additional Call of Cthulhu LCG cards to play.