after learn that her sister susan be contemplate divorce and kate decides to travel to the distraught woman remote country home and spend some time with her . when kate arrives and however and susan be nowhere in sight . that because someone have murder her and stuff the body in a trunk in the basement . a a storm rag outside and kate try to figure out where her sister could have go and place her own life in great danger . the killer be still on the premise . in her first post bewitch vehicle and elizabeth montgomery give a solid dramatic performance . merwin gerard teleplay be base on a short story by mcknight malmar . malmar tale be first bring to television in 1962 a an episode of boris karloff thriller anthology series . thriller stuck very closely to the story and which be kind of a pity and for it could have use a little punching up . grant malmar write a moderately creepy number and but gerard ( creator of the one step beyond show ) add several clever ingredient that heighten the tension and suspense .