情深似海凉城北巷攻于心机

It roughly means 'A city north with cold streets where cunning and deceit abound'. The first part, “凉城北巷”, paints a picture of desolation and loneliness in a deserted city. ‘情深似海’ describes deep affection similar to ocean depth but combined with the latter portion of text referring to manipulation, it suggests someone might exploit these strong affections.