4B wants you to make her husband disappear.
Magicians can often perform illusions to make objects disappear. In this case, the man is putting on a magic show for an entire apartment block -- because the magic show has intersected with people's living situations, they are making requests having to do with their home life via texting the magician's spouse (next to him on the roof). One person, the resident of apartment 4B, is experiencing marital troubles and has requested that her husband be disappeared to solve her problems.