Print-maker Peter Marsham can’t believe he owns a house of his own on Campion Square, and all from the sale of his artwork. Youngest son of an earl Cecil Montague has been banished to a boarding house on Campion Square by his father. They meet when Peter finds Cecil digging through a rubbish heap to rescue the remains of a pineapple, thinking he’s in need of help, and ends up offering to let Cecil attempt to grow the pineapple in his spare room.
Just as Peter and Cecil are beginning to sort out their feelings for each other, a series of thefts are reported in the square, and Cecil becomes a suspect. Now they must find a way to clear Cecil while keeping their secrets.